How Much Light Should I Use In A 2’X2’X4′ Tent

Quick Answer: How Much Light Should I Use In A 2’X2’x4′ Tent

We now have a rule of thumb for the amount of light wattage required for any particular grow space, thanks to a variety of different forms of study. The rule of thumb is that you should use 30 watts of light output for every square foot of space in your grow tent. As a result, around 120-140 watts of light power will be required for a 22 tent harvest.

What size LED light for 2×4 grow tent?

While the minimal amount of electricity required to cultivate cannabis in a 2×4 foot grow tent is 40 watts per plant, even the finest grow lights require at least 200 watts for the entire tent.

How much light do I need for a 4X4 grow tent?

To light a 44 tent, a grow lamp with an actual wattage range of 500-600 watts should be used (assuming blooming plants that demand a lot of light and are collected in a single location). Plants in high-light conditions require around half of this wattage for vegetative development.

What size carbon filter for 5×5 grow tent?

Table of Carbon Filter Sizes based on Grow Tent Dimensions Size of a Serial Grow Tent Dimensions of the carbon filter 3 5 5 6-inch or larger, or 6″x12″ or 8″x12″ 4 2 2 4-inch 5 4 8 8-inch filter 3 5 5 6-inch or larger, or 6″x12″ or 8″x12″ 6 1010 8-inch filters or an 8’x24′ carbon filter are required.

What is the best grow light for a 4X4 grow tent?

Product is our top choice. 1 MARS HYDRO Grow Tent Kit Complete 2x4ft TSL 2000W LED Grow Light Dimmable Grow Tent Complete System, 2 MARS HYDRO Grow Tent Kit Complete 2x4ft TSL 2000W LED Grow Light Dimmable Grow Tent Complete System Two four-foot Samsung LM301B LED grow lights with Meanwell drivers, three four-foot Phlizon Pro Series 2000W LED grow lights with Meanwell drivers, and four four-foot full spectrum Samsung LED grow lights with 2.8 mol/J each are included.

Can you have too much light in a grow tent?

Despite the fact that too much light can be detrimental to plant development, it is also a rather simple problem to resolve. Experts recommend 100 watts of light for a 2 foot by 2 foot grow area and up to 1,000 watts of light for an 8 foot by 8 foot grow area, depending on the size of the grow area.

How much light do I need in my Grow Tent?

According to conventional wisdom, you should aim for 32-50 watts per square foot of growing space. If your grow place is a specialized veg tent, you’ll need something closer to 25 watts. Using this example, if you’re dealing with a 3′ by 3′ space, you’d potentially want an LED light with a power demand that ranges between 225 watts (vegetative) to 450 watts (hi-tech) (flowering).

How many cars fit in a 5×5 tent?

In a 55 tent, there are nine automobiles.

What size exhaust fan for 5×5 grow tent?

Another 6 or 8-inch fan should be used for tent exhaust. This fan should be mounted again outside the tent, this time near to the outside air opening. If you are concerned about stinking air blowing outside the tent, you may hang the necessary charcoal filter inside the tent. This will prevent this from happening.

How many plants can a 1000w LED light grow?

So in this particular case, I would want an LED grow light that was at least 300 watts in power. What is the maximum number of plants I can grow? Size of the Growing Area The bare minimum in terms of watts You must be able to grow a minimum number of plants. 20 square feet (45 square meters) 1000w 1-20 plants (depending on the species)

What lights do professional growers use?

HIDs and fluorescents are now the most extensively utilized lights in the professional lighting industry.

High-pressure sodium (HPS/SON) and metal halide (MH) high-intensity discharge (HID) lights are often used by indoor flower and vegetable farmers, however fluorescents and LEDs are increasingly replacing metal halide HID lights because of their efficiency and cost-effectiveness.

How many lumens does a 2×2 grow tent need?

HIDs and fluorescents are now the most extensively utilized lights in the professional lighting sector. High-pressure sodium (HPS/SON) and metal halide (MH) high-intensity discharge (HID) lights are often used by indoor flower and vegetable farmers, however fluorescents and LEDs are increasingly being used to replace metal halide lights because of their efficiency and cost-savings advantages.

What size light for 2x2x4 grow tent?

The general rule of thumb is 50-60 watts per square foot. I’m assuming your tent is 2x2x4′ tall, which gives you 4 square feet of space or 200 watts.

How many plants can go under 600w LED?

The yield of 2 month plants should be around 40g per plant, which means that with roughly 9 plants, you’ll be able to cover a square meter with ease and receive up to 400g per 600w light. 3 month autoflowering plants, on the other hand, grow significantly larger, thus you should only plant four of them per 600w bulb.

Do Grow Tents need ventilation?

Effective grow tent ventilation is critical for healthy plant development, and effective filtration is equally important for cleaning the air and eliminating all aromas from the environment. Furthermore, it is critical to ensure that the air within your tent is circulated. This will help to keep temperatures and smells down, as well as strengthen plants, among other things.

How much area does a 1000 watt LED grow light cover?

When hanging 2 feet above the plants, a 1000 watt grow lamp can illuminate an area of around 7 feet square when suspended 2 feet above the plants. A 400-watt lamp would be sufficient for illuminating an area around 4 feet square.

What size light for 5×5 grow tent?

For a 5×5 tent, it is advisable to use lights that are around 1000 watts (High-Pressure Sodium). Although HPS lights appear to be yellow in hue, they actually contain color spectrums that are yellow and red. Plants that bloom well in both spectrums are encouraged to do so.

What size LED light for 3×3 grow tent?

In a 3×3 tent, you should aim for 350 watts of power. I would stay away from Amazon’s LED lights. They are either inexpensive and of poor quality, or expensive and of poor quality in some situations. If you’re searching for a light that’s ready to go, 700 is going to be difficult to come by.

How much does it cost to run a 1000W LED Grow Light?

You must multiply your watts by 1,000 to get your wattage (1,000 kilowats in 1 watt). For example, if we were to use a 1000 watt grow light for eighteen hours a day at the kWh rate we mentioned previously, our formula would be: 1 x $0.1559 x eighteen hours x thirty days = $84.186/month.

What size LED light for 2×2 grow tent?

3. California Light Works is a lighting design company based in California. SolarXtreme 250 LED Grow Light is a high-performance LED grow light. With a power consumption of 200 watts, the SolarXtreme 250 cannabis LED light is appropriate for places up to 9 square feet in size. As a result, a 2′ x 2′ tent or a 3′ x 3′ tent will work perfectly with this light.

How many lights do I need for 12 plants?

Four 600-watt bulbs, at the very least, would be plenty to illuminate the whole space and allow you to move freely about the plants when it is time to water them, for example.

Overall though, you could grow 12 medium-sized plants under 2x600w lights and partition off a portion of the room depending on how much you want to achieve (in terms of grams).

How many plants can you put in a 4X4 grow tent?

4-6 plants, depending on the technique of cultivation and the style of cultivation. Always keep in mind that you want to ensure that there is adequate ventilation around your plants. If you have too many plants, the air becomes stagnant, and you create problems with your buds and leaves.

The Best Grow Lights For A 2×4 Grow Tent – Pictures, Specs, And More

What are the finest grow light options for a 2×4 grow tent and how do you choose them? Take a look at one of the following alternatives: A 150-watt high-pressure sodium (HPS) grow light, a Spider Farmer SF-2000, a Green Sunshine ES300, or the HLG 320-watt DIY quantum board LED grow light are all good options. When selecting a grow light for a 2×4 foot grow tent, the light intensity and consistent coverage area of the lamps are the most significant elements to consider, according to the manufacturer.

All of the alternatives I’ve listed below fulfill or surpass those standards.

Despite the fact that there are a plethora of perplexing lighting options available, either of these grow lights will function well in your 2×4 grow tent.

Many folks who are contemplating 2×4 foot grow tents are also considering 3×3 foot grow tents, according to my observations.

Budget Choice:Hydroplanet 150 watt HPS grow light

Why am I proposing an HPS grow lamp as one among your two-by-four-foot grow tent’s lighting options? I communicate to farmers on a regular basis, and some of them are on a tight budget. For a variety of reasons, this 150 watt high pressure sodium grow lamp from Hydroplanet is an excellent choice for a 2×4 grow tent:

  • It is inexpensive. The light intensity is sufficient for two 4x4ft grow tents to be set up. Despite the fact that HPS grow lights have a bad reputation for being heat generators and electricity hogs, this little 150 watt type does not generate much heat and does not waste much electricity due to its modest size. Indeed, it consumes less energy than the LED lights that I’ll be describing later.

Using low-quality lighting is not my first option, and I strongly advise against doing so. In contrast, if you’re really short for cash, the 150 watts of power from this lamp will suffice. One thing I’d recommend to consumers of this Hydroplanet 150w HPS grow light is that they acquire a wing reflector separately rather than utilizing the hood type reflector that comes with the light. Using a wing-style reflector will allow you to distribute light more evenly across your 2×4 foot grow tent. The rest of the time, this grow light is a plug-and-play device.

Simply suspend this light between 18 and 24 inches above your canopy and you’ll be ready to go.

Click Here to See Prices and Reviews of the Hydroplanet 150w HPS Grow Light on Amazon

The Spider Farmer SF-2000 is a quantum board LED grow light that is both contemporary and efficient. This light has a coverage area of 2×4 feet and uses the same LEDs and driver as the HLG, but it’s priced a little less expensive than the latter. LM301B LEDs were used in this project, and the driver was provided by Mean Well, which is a high quality, industry standard driver. My 2×4 grow tent at home has one, and it looks and functions great. I highly recommend it. You can read the rest of my Spider Farmer review right here.

Take a look at the amount of light that the SF-2000 produces: The SF-2000 emits a spectrum that includes warm white (3000K), cool white (5000K), 660nm (red), and 760nm (blue) wavelengths (infrared).

See what people have produced under Spider Farmer grow lights in the following examples: These photos were taken from Instagram, and you can see the hefty buds that the Spider Farmer proprietors have grown. These plants are nothing to be squeamished about.

SF-2000 Key Specifications:

  • Will blossom in a 2x4ft area — a larger space is required for seedlings. It consumes 200 watts of electricity. An adjustable ballast is incorporated. LEDs and drivers of superior quality (Samsung and Mean Well)
  • Price-performance ratio is the best available

Does the SF-2000 get hot?

It does generate some heat, as do all grow lights, but the amount is tolerable. Maintain proper air circulation and temperature control in the room where your 2×4 grow tent is positioned.

What height do I hang the SF-2000?

It is safe to hang this light at a height of 18 inches throughout vegetative and blooming stages, and at a height of 28 inches for seedlings. If you don’t have enough room to raise the light, you may always dim it; however, you’ll have to unscrew the driver from the board in order to get to the dimming screw, which is located on the bottom of the driver, which will need some effort.


Unboxing and overview of the Spider Farmer SF-2000 Quantum Board LED Grow Light by Spider Farmer.

Click Here to View or Purchase the Spider Farmer SF-2000

Designed specifically for use in 2×4 foot grow tents, the Green Sunshine Electric Sky ES300 is a high-end LED grow light. This is a high-intensity grow light with a spectrum that has been specially tailored. You’ll have to pay a premium in exchange for this. But it’s well worth the effort. Because the Green Sunshine Company feels that most grow light spectrums lack sufficient infrared, the ES300 generates greater amounts of infrared and red than is often seen in grow lights. The following is a breakdown of the colors: Blue makes up approximately 10% of the spectrum; green makes up 25% of the spectrum; red makes up 55% of the spectrum; and infrared makes up 10% of the spectrum.

  1. The University of Michigan conducted an experiment to see if the incorporation of green light is beneficial to plant development when compared to other typical spectrum makeups.
  2. According to the Green Sunshine Company, “With the unique high-dose of near-infrared light, huge blooms commence earlier, vegetation develops quicker, and the plant makes more effective use of light from what is known as the Emerson Effect.
  3. What you said piqued my interest immediately.
  4. Finally, take a look at the light intensity when it is suspended 18 inches over the canopy of a 2×4 foot grow tent: That is an astounding quantity of light spread throughout the whole 2×4 foot footprint of the grow tent.
See also:  How Many People Would A 20 By 40 Tent Accomodate

ES300 Key Specifications:

  • A 2×4 foot grow tent will produce flowers. Provides a broader area for seedlings to grow
  • It consumes 300 watts of electricity and has dimming capabilities. Extremely high performance in a 2×4 configuration
  • The heat sink frame effectively dissipates heat.

What Height to Hang The Green Sunshine ES300:

Because of the unique lenses on the ES 300, you can get the light extremely near to the plants without burning them.

The Green Sunshine Company specifically indicates that the light may be suspended as low as 12 to 15 inches above your canopy during the flowering phase, despite the fact that the intensity values above are from the normal 18-inch height. That’s quite an accomplishment.


Unboxing, review, and PAR testing of the Electric Sky ES300 LED grow light

Growers’ Opinions:

Green Sunshine grow lights have had consistently positive feedback, and I haven’t come across a grow light that has received more consistently favorable feedback as the Green Sunshine grow lights in my study. Please feel free to peruse the reviews on your own. Other than generally good remarks, gardeners have noted shorter vegetative development stages and higher-quality plants as advantages of using the product.

Click Here to See Prices and Reviews for the Green Sunshine ES300 at LED Grow Lights Depot

Growing in a 2×4 foot grow tent with the HLG 260 watt QB (quantum board) is a popular option for growers that don’t mind spending a few minutes putting it together. This is the XL variant, which means that the main board is longer than usual, allowing for greater space between the LED boards, which results in improved light uniformity. It is an excellent choice for a 2×4 space since you are receiving HLG quality and performance at a reasonable price with the HLG 260 watt quantum board. Assembling the light yourself enables them to sell the board at a lower cost than they otherwise would.

HLG 260 Watt QB XL Key Specifications:

  • A 2×4 foot area is sufficient
  • No soldering is required. Only a screwdriver and a wire remover are required. At 2.7 umol/Joule, it is extremely energy efficient
  • It consumes 260 watts. Driver with dimming capability
  • Included is a hanging kit. Color temperature of 3500K with red wavelength of 660nm (see below)
Here’s a look at the intensity when the light was tested in open air:

Keep in mind that this is an open-air test, and that when you install the HLG 260 watt QB into your grow tent, the reflecting walls will enhance the light intensity much higher than it already is. The temperature in the spectrum is 3500K, which is usually considered to be the optimal temperature for growing cannabis at all stages of growth. Additionally, the lamp has 660nm red LEDs, which guarantee that there is enough red light to support a vigorous blooming cycle.


Although the video below is for the non-XL version, the assembly procedure is the same, so you should be able to get a sense of what to expect: DIY LED Grow Light Kit by Horticulture Lighting Group (260 watts): Construction and Evaluation

Click Here to See Prices and Reviews of the HLG 260 watt QB at LED Grow Lights Depot

After reading my lists, many growers contact me to seek for my advice. My personal preference for a 2×4 foot grow tent would be either the Spider Farmer SF-2000 or the Green Sunshine ES300, both of which are available on Amazon. Both of these lights are excellent choices, and I believe you will be pleased with any one. The HLG is also a very nice camera, but it faces stiff competition from the SF-2000, which is significantly less expensive. The Phlizon Linear Series PH-3000 received an honorable mention.

I don’t advocate the 150w high-pressure sodium lamp, although I do talk to folks who are on a limited budget from time to time.


A 2×4 foot grow tent may accommodate up to 40 watts per plant, while the best grow lights require at least 200 watts for the entire tent to function well.

How many cannabis plants fit in a 2×4 grow tent?

In a 2×4 grow tent, two to three cannabis plants can be accommodated.

According to how huge the plants are permitted to grow, the price might fluctuate.

What size inline fan should I use in a 2×4 grow tent?

For a 2×4 grow tent, an inline fan with a capacity of 100 cfm to 120 cfm will be sufficient ventilation.

How do I control temperatures in a 2×4 grow tent?

Open a window or turn on an air conditioner if your grow tent is becoming too hot. You can also try cooling the room where the tent is situated. If the temperature inside the grow tent is too low, you may need to purchase a space heater for the room where the tent is placed.

How do I control humidity in a 2×4 grow tent?

The use of a humidifier or dehumidifier in your grow tent will allow you to regulate the humidity level. References:

What Size Grow Light Do I Need? (The Simplest Way To Figure It Out)

It might be difficult to figure out what size grow light you need for your plants. A variety of elements come into play, like the sort of lighting you prefer, the plant(s) you are growing, the size of your grow space, and so on and so forth. In this essay, I break down the problem and attempt to make it as straightforward as possible. Before you begin, you must determine the light requirements of your plant(s), the sort of lighting you intend to employ, and the size of your grow space. 1. Requirements in terms of lighting When it comes to the light need, all you really need to know is whether it has a high or a low requirement for light.

  • Herbs and lettuce, for example, are examples of plants with minimal light requirements since they do not blossom.
  • The Kind of Lighting To be on the safe side, use fluorescent lights if you just have one (or maybe two) plants and LED or CMH lights otherwise if you are unclear which sort of illumination you will require.
  • 3.
  • Alternatively, you can measure the plant (s).
  • It is time to get started once you have obtained those three pieces of information.
  • In order to determine what size of light you require and how many lights you require, if you require more than one, follow the instructions.

How To Determine The Size (And Number) Of Grow Light(s) You Need

I’ll start with high pressure sodium and metal halide lighting, then go on to compact fluorescent, then LED, and lastly fluorescent.

What Size HPS And MH Lights Do I Need?

High pressure sodium and metal halide lighting are the most straightforward types of lighting to understand (along with CMH below). There are two approaches that you can take.

By Coverage Area

It is simple to determine which light(s) will best cover your grow space if you know the size of your grow space (for example, the size of your grow tent). According to the most commonly used MH and HPS bulbs, the following approximate maximum coverage areas may be achieved with these wattages:

  • 150 watts: 2 x 2 feet (or 4 square feet)
  • 250 watts: 2.5 x 2.5 feet (or 6.25 square feet)
  • 400 watts: 3 x 3 feet (or 95 square feet)
  • 600 watts: 4 x 4 feet (or 16 square feet)
  • 1000 watts: 5 x 5 feet (or 25 square feet)
  • 1500 watts: 5 x 5 feet (or 25 square feet)
  • 2000 watts: 5 x 5 feet (or 25 square feet)

You should be able to determine which size light is appropriate for you and how many lights you require based on this information. If all else is equal, 600 watt lights are the most efficient (meaning they produce more light per watt of power consumed) and 1000 watt bulbs are the second most efficient, so you should always check to see if they would work in your space first. Consider the following scenario: you have an area that measures 10 by 20 feet, or 200 square feet. That is completely divisible by 4 (the 150 watt bulb) or 25 (the total number of watts) (the 1000 watt bulb).

The eight 1000 watt bulb option is far superior.

Although the area is not exactly divisible, 200 divided by 16 gets you 12.5, which means you would only need to utilize 12 or 13 fixtures to make them all fit in the space.

One thing to keep in mind is that this is based on the maximum coverage regions available for each bulb power.

If you want to provide your plants enough of light in order to increase yields, the following approach makes it crystal apparent and provides greater outcomes than the previous one.

By Wattage

The alternative method for determining your MH and/or HPS lighting requirements is to look at the wattage requirements. Cannabis, for example, requires between 30 and 70 watts per square foot of canopy to thrive, making it an ideal plant for growing indoors. I would recommend a minimum of 50 watts per square foot of floor space. If money is not a problem and heat is not a concern, increase the power to 65 watts per square foot. Let’s have a look at the previous example once again. The one with a 200-square-foot floor space, to be precise.

In such case, ten 1000-watt lights (10,000 / 1000 = 10) or seventeen 600-watt bulbs (10,000 / 600 = 16.67, which we round up to 17) would be required.

By working backwards, we can see that the preceding technique would provide coverage of 40 watts per square foot (eight bulbs each at 1000 watts = 80,000 total watts divided by 200 sq ft area = 40 watts per square foot).

You may check my reviews of the best bargain HID kits if you’re not sure which brand is the best choice.

What Size CMH Grow Light Do I Need?

Because there are just two typical wattages available: 315 watts and 630 watts, ceramic metal halide is much simpler to figure out than incandescent (which is a fixture with two 315 watt bulbs in it). One way to think about them is to examine the 315w bulb, which is comparable to 600w of MH or HPS light, and the 630w twin bulb fixtures, which are equivalent to 1000 watts of MH or HPS light. This implies that a 315 watt light will cover up to 44% of the area, while a 630 watt fixture will cover up to 55% of the area.

Check out my reviews of the best-value ceramic metal halide lighting kits if you aren’t sure which type of light you want.

How Many Watts Per Square Foot For LED Grow Lights?

In order to decide what size LED light(s) they require, most people use the wattage per square foot method, however this is not the only one. In addition, it is not the most exact method, but it is an excellent balance between accuracy and simplicity. Simply put, selecting how strong an LED grow lamp to purchase and how many of them you require is the most difficult task of all when it comes to growing plants under artificial light. This is owing to the wide range of lights available, as well as the fact that most manufacturers flat out lie about the specifications of their products.

That doesn’t rule out the possibility of figuring it out. In this case, there are three options to examine. I’ll list them in descending order of difficulty, starting with the easiest (and least accurate) and progressing to the most challenging (but also the most accurate).

Using The Coverage Area Provided By The Manufacturer

When purchasing lights, most manufacturers disclose the coverage area of their lights, which you may use to determine which light will be able to adequately cover your grow space. Isn’t it nice and straightforward? If only everything were that simple. Unfortunately, many manufacturers (mostly Chinese, but also a significant number of American companies) overstate the area that their lights will successfully cover. The coverage area for a low-light-requirement plant (and not one with a high requirement, such as marijuana) or the coverage area for vegging, which is always bigger than the coverage area for blooming, are examples of what they could tell you to do.

See also:  What Is The Best Grow Tent Setup

Unfortunately, I do not have a decent answer for this problem at the moment.

If you’re looking for information about lights that I haven’t examined, you’ll have to go online.

Using The Wattage

If you want to grow a plant that requires a lot of light, you should aim for 30 to 40 watts per square foot of canopy area. Once again, there is a major issue to contend with. The majority of LED manufacturers provide both an actual wattage and a theoretical wattage (what the light would consume if the chips were all driven at full power, which they never are). Important! It is preferable to use real wattage for this calculation. This need a little investigation in order to determine the real wattage of a light bulb.

  1. Many Chinese manufacturers do not even employ theoretical watts in their products.
  2. Roleadro’s 2000 watt light, for example, only consumes 230 watts in reality (Roleadro is one of the absolute worst offenders when it comes to blatantly making up numbers).
  3. They frequently bury it in the bottom of the page, but it is virtually always visible at the top.
  4. Consider the following illustration.
  5. 6000 watts total would be required to illuminate that area with LED grow lights if we were to go for the lowest possible wattage per square foot of 30 watts per square foot of light.
  6. This lamp has an actual power of 615w, therefore if we used 10 of these, we would have a total of 6150 watts.
  7. Consider the following scenario: you have a 3×3 grow tent.
  8. At 30 watts per square foot, you’d need a total of 270 watts to cover the area.
  9. As a result, to illuminate this space, you would want an LED grow lamp with an actual wattage of 270 to 360.
  10. As a result, the efficiency of the light is not taken into consideration with this technique.
  11. However, the actual output will vary widely from one manufacturer to the next, and wattage is regarded as a decent indication for the quantity of light a fixture would offer.

Phlizon lights are simply more energy efficient than traditional lights. As a result, we arrive at the most accurate method: relying on the original output.

Using The Output

While this approach is the most accurate, it is also the most difficult to utilize since many manufacturers do not publish a great deal (if any) of useful information on the output of their lighting fixtures. This is especially true when it comes to Chinese-made products. Even if they do offer output information, they frequently just take a reading dead center underneath the light, which is where the output is at its most powerful, rather than everywhere else. They do not provide readings for the remainder of the coverage area, which is frequently due to the fact that the light is quite feeble around the outside of the region.

  1. I’m sure you’re curious in how output is assessed and what level of output is considered satisfactory.
  2. It is measured in units of micromoles per square meter per second and informs you how much light is present in the wavelengths that plants employ for photosynthesis.
  3. Plants should receive between 300 and 600 umol/m2/s during the vegetative stage and between 600 and 1000 umol/m2/s during the bloom stage in order to get best results.
  4. You want to acquire at least 100 umol/m2/s, but preferably more.
  5. A PPFD footprint will be provided by reputable manufacturers (also referred to as a PAR footprint or a PAR chart).
  6. Most of the better lights will not have sky-high readings in the centre (and hence much lesser readings around the perimeter), but will instead have decent readings all across the place (even if the manufacturer just supplies the number for the middle).

What Size Fluorescent Grow Light Do I Need?

Fluorescent lights are only useful for a couple of plants at a time. They become inefficient if they are used for any longer than that. This article explains how to calculate the number of fluorescent bulbs you will require. Instead of reading that, just know that you’ll need between 60 and 100 real watts per square foot of growing space to have a good yield.

Cannabis Grow Lights: What’s the Best Size?

Nebula Haze is the author of this piece. You’re scouring Amazon in search of the finest grow light available. Choosing from so many possibilities might be intimidating. Are you looking for conventional LEDs, a quantum board, an LED puck, or something else altogether?

What do you prefer: an HLG 300 or a Mars TS 2000? What size do you require in order to achieve the desired results? You’ll get the answers to your questions today. Three of the most often asked questions about grow light size

  1. What is the optimal size of a grow light for a given number of plants? In what size grow light should you put in a 2×4, 3×3, or 4×4 grow tent? (and other sizes)
  2. What kind of yields should I expect from each size of grow light?

There are so many different sizes (and varieties) to choose from! Which grow light is the most appropriate for you?

1.) What’s the best size grow light for X number of plants?

Let’s speak about plant numbers for a moment before I respond to your query. It might be difficult to determine the optimal amount of plants to cultivate. Most home-grow rules restrict growers to a number of plants from 1-6 in number. While it is easy to cultivate only a few plants at a time, growing more plants results in a greater variety of strains and, in many cases, larger harvest yields. It provided outstanding yields, but the harvest would have been greater had there been more open area under the grow light to distribute the nutrients evenly.

  • In addition, growing only one plant at a time results in a single point of failure.
  • Single cannabis plants provide higher yields when they are forced to grow flat and wide, but this can add several weeks to the time it takes to harvest.
  • As a result of how quickly several plants may occupy a grow area during the vegetative stage, they can generate a speedy harvest with large yields.
  • Who doesn’t like a swift and plentiful harvest?
  • With eight plants in such a little space, it was a real challenge to keep them all alive and well.
  • But every grower is unique in their own way!
  • You must first determine how much bud you want to harvest from each plant.
  • Ideally, I’d want to get an average of.
  • 1-2 ounce per plant equates to 50W per plant
  • 3-4 oz per plant equates to 100W per plant
  • 5+ oz per plant equates to 150+ W per plant.

It should be noted that some grow lights are more suitable for cannabis cultivation than others. This implies that you may buy two 300W grow lights that produce drastically different yields from one another. These figures, on the other hand, represent an approximate approximation. And keep in mind that high-yielding genetics and grower expertise can help you achieve superior yields regardless of the type of light you are using. The clones in these two tents were produced under identical circumstances, with the exception of the grow light.

  • Despite the fact that both lights consumed a same amount of power (about 300w), the LEC tent generated more trichomes and greater levels of terpenes, whilst the HLG grow light produced larger yields and higher THC output than the other.
  • True power use against comparable wattage– When discussing watts, it is important to include the “actual power draw” (the amount of electricity that is being sucked from the wall) in order to accurately determine the intensity of the grow light.
  • What is the reason for the ambiguous labeling?
  • The initial generation of LEDs were all advertised as “600w HPS equivalent,” despite the fact that they used a fraction of the power and produced a fraction of the yields of the HPS.
  • It has been more than a decade since the practice of nonsensical LED labeling was introduced, yet it now appears to be fading from public perception.

You don’t need a lot of electricity to generate a lot of production, and producers are starting to recognize the importance of using actual data rather than “equivalents” that marketing teams make up. Examples of suggested grow lights, along with frank discussion of what to expect are as follows:

  • Despite the fact that the Mars Hydro TSL 2000WLED grow light is “2000W comparable,” it only consumes 300W. Consider the genuine power draw (300W) for determining yields and plant numbers rather than the comparable power draw (200W). From the chart above, it appears that the 300W light might produce up to 10 oz with 2-6 plants under its control. Growing studies have shown that an average-to-good grow yields 8-10 oz. The Spider Farmer SF-2000LED grow light also has “2000” in the name, but this one only draws 200W from the wall, according to the manufacturer. You might get up to 7 oz of marijuana with just 1-4 plants, according to this estimate. The Spider Farmer lights, on the other hand, appear to be effective with cannabis plants, with some growers reporting yields of up to 8 oz with this light
  • The Phlizon 1200WLED uses 250W from the wall, so you could expect results somewhere in the middle of the two lights mentioned above, or yields of up to 8-9 oz with 1-5 plants. However, because this particular kind of LED does not function as well as other LEDs, farmers generally wind up with yields of less than 7 ounces.

I hope this helps to explain why you should look at both the grower outcomes and the real power consumption when comparing lights, rather than just looking at the “equivalent” figure on an LED grow light, to make an informed decision. Fortunately, many respected LED firms are transitioning away from using equivalent wattages in their product names and instead using genuine wattages. For example, HLG lights such as theHLG 600 R-Specare appropriately mentioned on the website. The term 600 refers to the fact that it utilizes 600W, which implies a grower may expect roughly 20 oz of yield from 4-12 plants.

On a decent grow with 1-4 plants, this light may produce up to 8 oz of cannabis.

2.) What size grow light for a 2×4, 3×3, or 4×4 grow tent? (Metric 0.6mx0.6m or 1mx1m, etc.)

Some farmers are only concerned with maximizing the amount of power they consume, while others are more concerned with producing the highest possible yields, and yet others are primarily concerned with making things easy for themselves. Here are some crucial considerations to keep in mind when selecting the appropriate size grow light for your growing environment:

  • Product specifications normally provide the suggested light footprint for each grow lamp, which can be found in the product details section of the product page for most manufacturers. For example, it may state that the suggested footprint size for the blooming stage is 2’x4″. That indicates that this light is intended for use in growing plants in an area of that size. Even more than the instructions listed below, it is strongly advised that you follow the manufacturer’s recommendations first
  • Otherwise, How to obtain the most possible yields from electricity– Some lights are more energy efficient than others when it comes to use of electricity. Most of the time, the smaller LED grow lights (around 300w or so) are the most energy efficient and provide the highest yields for the amount of electricity consumed. CFLs and T5 fluorescent grow lights, for example, are known to provide the lowest yields for their watts. It also helps to enhance efficiency by selecting a light that is modest enough for your growing space. This is due to the fact that there will be some more light around the margins, which will increase your yields by little but considerable quantities without consuming any additional energy. It’s also simpler to regulate heat in a place that’s somewhat larger than it needs to be as a side benefit. How to obtain the best yields for your space– If you are more concerned with maximizing yields for a certain space, it is advised that you get the most powerful grow light that your area is capable of accommodating. LED and high-pressure sodium (HPS) grow lights produce the highest yields for the smallest amount of area. Once you go to larger sizes (say, above 500W), an HPS will almost always provide greater yields for the same amount of area as an LED (if not necessarily the most electrically efficient). Growing marijuana under a 600W HPS grow lamp in a 4’x4′ grow tent is an amazing option that costs approximately $800 to set up and can yield more than 20 ounces every harvest. The 600w HPS lamp is the most energy-efficient of all the HPS lights available. If you are prepared to put up with a lot of heat, you can even fit a 1000W grow light in a 4’x4′ grow room and get 35 oz or more of harvest. When working with larger lights in a smaller space, it is more critical than ever to design a good exhaust system to vent the heat generated. True wattage– When searching for grow lights, seek for the true power draw, which is the amount of electricity required to run the grow light in its whole. This information is frequently hidden deep inside the product specifications. The actual wattage utilized allows you to compare and contrast different grow lights in real time. This number is frequently different from the number in the name of the LED grow light (see examples below)
See also:  How To Get The Most Yield Out Of A 4' X 4' Grow Tent

Each grow lamp has a suggested light footprint that should be followed. Check the product specifications to ensure that the grow light is appropriate for the size of your growing space in order to achieve the best results. A particular amount of space is covered completely by each grow light, which is tailored for that amount of space. The following are some examples of common size grow tents:

  • 2’x2′ (also known as 24″x24″ or 60″x60″) The dimensions are 2’x4′ (also 48′′x24′′ or 120cm x 60cm) and the maximum power is 150w. –Up to 400 watts
  • 3’x3′ (also 36″x36″ or 90cmx90cm or occasionally 1mx1m) or larger. A maximum of 400 watts can be used in an area of 4’x4′ (48″x48″, 120″x120″, or 1 meter by 1 meter). With a good cooling system, you may get up to 600W or even 1000W of power.

Please keep in mind that watt recommendations are always based on actual power use. This represents the quantity of power that is being drawn from the wall.

3.) What yields can I expect for each size grow light?

A number of these questions are strongly related to one another, as you’ll see in the next section. I’m talking about yields as well as the amount of plants and grow lights, oh my! This section examines not just wattages, but also the type of grow light being used. Here’s some information on the typical yields you may expect based on the type of grow light you use. CFLs and T5 fluorescent lamps are examples of fluorescent lighting.

  • Maintain short and flat plants with close proximity to grow lights for the highest yields (100w = 25-50g)
  • For the best yields, keep plants short and flat with close proximity to grow lights.

CMH/LECMH/HPS grow lights are examples of high-intensity discharge (HID) lighting.

  • 0.5g-1g/watt (400w = 7-14 oz)
  • These lights are hot
  • They’re best for winter
  • When the heat is kept under control, they provide outstanding yields and bud density.

A wide variety of LED models and types are available.

  • 0.5-1g/watt (300w = 5-10 oz) –extremely variable
  • Some LEDs perform worse than others, while some LED types easily outperform these figures. LEDs operate at a lower temperature, allowing plants to better withstand the heat
  • This is ideal for summer cultivation. It has come to my attention that the best LEDs for cannabis typically emit white light with pink or yellow overtones (here’s my current LED setup, which includes a 300W quantum board)
  • And Black/purple LEDs (also known as “blurples”) provide lower cannabis yields per watt than LEDs with a wider spectrum of colors.

Typically, “blurple” LEDs don’t emit as much light as LEDs with a wider color range, which are more expensive (though not always) The best-yielding LEDs for cannabis during the blooming stage often emit a pinkish or yellow-white light, depending on the manufacturer. Every LED model, on the other hand, is distinct. Here’s the LED configuration that I’m currently utilizing (highly recommended)

Best Cannabis LED lights for 2 X 2 Grow Tent

Are you a first-time grower of cannabis plants in an indoor environment? You could be an experienced grower who wants to upgrade from your standard cannabis grow lights to LEDs for a variety of reasons. In either case, we’ve got you covered with our selection of the best cannabis LED lights on the market! When it comes to indoor plants, LED (Light Emitting Diodes) lights are a more durable and environmentally responsible approach to simulate the sun. There is no gas used in these lights, and they contain no lead or mercury.

  1. What’s not to like about this, right?
  2. The use of LEDs is getting less expensive and more energy efficient as manufacturers become more creative in their designs.
  3. We’ll go over the specifics of the finest LED grow lights for a 2′ by 2′ tent in more depth.
  4. Here are a few things to think about: Plant House Indoor Grow Tent 2’x2’x67″ Plant House Indoor Grow Tent” Gorilla Grow Tent Shorty is a short version of the Gorilla Grow Tent.

LITE LINE 2’x2.5′ Gorilla Grow Tent 2’x2.5′ Gorilla Grow Tent 3 feet by 2.5 feet by 5 feet 7 inches “Two-foot-by-two-foot Gorilla Grow Tent

Can any LED light be used as a Cannabis grow light?

No, not at all. Cannabis LED grow lights are designed to accommodate the power requirements of plants while also providing a broad spectrum of light. Aside from that, they include built-in fans to keep the lights cool, and some of them are dimmable, while others are simply adjustable. Because of all of these design specifications, LED grow lights are more ideal for use in a grow room than standard LED bulbs. Prevent yourself from purchasing a cannabis LED grow light for your grow tent until you’ve read through our great cannabis LED light suggestions outlined below.

Top 7 Cannabis LEDs for 2 x 2 grow tents

A quick glance at the best LED grow lamp models for a 2′ by 2′ tent is as follows:

  1. California Light Works SolarSystem 275 (200 watts) is the best overall choice. The HLG 225 Elite (225w) is the best value for money
  2. The HLG 65 V2 (65w) is the best light for a single plant.
1. California Light Works SolarSystem 275 LED Grow Light

Compared to non-LED competitors, this lightweight LED grow light weighs only a little over seven pounds and is 40 percent more energy efficient. Because of its capacity to simulate natural sunshine, it is ideal for use at all phases of a plant’s life, including seedling, vegetative growth, and flower development. The reason this guy gets the top place isn’t only because it’s the most costly of all the lights; it’s also because it was designed by a firm headquartered in Southern California that has a lengthy history in LED lighting technology as well.

  1. The California Light Works SolarSystem makes use of some of the most cutting-edge LEDs currently available, along with an excellent heat dissipation design, to provide the highest possible output (umol/Joule 400-700nm for the scientists out there) of 2.4 watts.
  2. If you elect to purchase the SolarSystem Controller, you will have the ability to modify the heat settings based on the stage of growth that your plant is in.
  3. Another important benefit of the SolarSystem 275 is that you will never have to replace the light bulb again.
  4. If anything should happen to the bulb during its 5-year guarantee period, California Light Works will replace it free of charge.
  5. Specifications of the product
  • Energy efficiency (umol/Joule 400-700nm): 2.4
  • Voltage: 90-277 VAC
  • 2 channel dimming
  • Lifespan of 50,000 hours
  • Power: 200W Water-resistant built-in fan with a lifespan of 50,000 hours
  • Dimensions: 8.5 in x 8.5 in x 4 in
  • Warranty: 5 years
  • Price: $489

How Many LED Watts Are Required Per Square Foot of Grow Space?

*This article was last updated in May 2018. Are you a newcomer to the world of LED cultivation? If this is the case, the charts below will assist you in determining how much energy (measured in watts) your plants require to blossom. Disclaimer: Wattage is a legacy of the days of high-intensity discharge (HID) lamps (MH and HPS). The coverage area of a fixture or the utility of an LED grow light should not be determined by the wattage of the fixture or the LED grow light. Using wattage as a simple technique of estimating the optimal fixture size for your grow should be limited to the most basic of situations.

PPFD (and spectrum) are essential components of a good grow when used in conjunction with the appropriate spectrum for your plant type and development phase.

The term “wattage” in this article refers to the amount of electricity that is pulled from the wall, not to the amount of electricity that is drawn from the LEDs, which is normally the product of the maximum LED wattage multiplied by the number of LEDs specified by the manufacturer.

For example, a 900 watt LED grow light would be made up of 300 x 3-watt LEDs. The LED grow light, on the other hand, may only consume 500 watts when connected to the wall.

Grow variables

It is critical to note that the amount of actual watts that you will use for your grow will vary based on the following factors:

  • Plants that require a lot of light, such as tomatoes, peppers, and other vegetables
  • Plants that require little light, such as herbs and leafy greens (such as basil lettuce)
  • There is a significant difference in the quantity of light required by seedlings, vegetative, and blooming plants.

Watts per square foot

For blooming, the typical LED grow lamp consumes around 32 watts to cover 1 square foot. This is in stark contrast to a conventional HID lamp, which consumes 40 watts per square foot (assuming a 5′ x 5′ space or a coverage area of 25 square feet). The use of a HID in a 4′ x 4′ area will increase the power coverage to 62.5 watts per square foot (psf). (The energy savings that growers may expect from employing LED grow lights instead of high-intensity discharge lights is around 38 percent.) This energy savings figure solely includes the savings that farmers realize as a result of utilizing LED lighting fixtures.

For example, depending on the size of the setup and the temperature of the surrounding environment, less ventilation and air conditioning may be employed, or it may be altogether avoided.

More energy-efficient LED grow lights will consume fewer watts to produce the same amount of light that a less energy-efficient LED grow light would provide.

LED Wattage Chart Explanation

The wattages indicated below are based on the assumption that you are blooming your plants. If you’re growing vegetables, you might want to consider reducing your wattage by 50% because vegging plants only require roughly half the amount of light that flowering plants do. As is always the case, following the manufacturer’s advice is the best course of action.

Using the charts

The following columns will be included in each of the charts:

  • Plants to be cultivated in a certain area The area covered by a certain number of plants in terms of square footage
  • The recommended LED wattage is based on the quantity of plants being grown in the given space.

Wattage charts

For blooming, assume a wattage of around 32 watts per square foot (real LED wattage). Smaller yields may be associated with lower wattage, whereas bigger yields may be associated with higher wattage.

Quick Guide (watts per coverage area)

of Plants Square Feet Wattage from Wall
1 1 30 to 40 watts
2 2 60 to 80 watts
4 4 120 to 140 watts
6 6 180 to 200 watts
8 8 240 to 300 watts
10 10 300 to 340 watts

Recommended wattage assuming 2.0 sq ft/plant

of Plants Square Feet Wattage from Wall
1 2 60 to 80 watts
2 4 120 to 140 watts
4 8 240 to 300 watts
6 12 360 to 400 watts
8 16 500 to 650 watts
10 20 600 to 800 watts

Recommended assuming 4.0 sq ft/plant

of Plants Square Feet Wattage from Wall
1 4 120 to 140 watts
2 8 240 to 300 watts
4 16 500 to 650 watts
6 24 700 to 860 watts
8 32 900 to 1100 watts
10 40 1100 to 1400 watts

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Related:What is the difference between PAR, PPF, DLI, and Efficacy? It is important to understand the light factors that affect your indoor plants. See what else you should think about before choosing an LED grow light in this article. Please keep in mind that the growing of some plants may or may not be permitted in your individual region or nation, depending on the laws in place. LED Grow Lights Depot does not advocate or condone any unlawful conduct, and we urge each person / user to become familiar with the applicable laws in their own region or nation before engaging in it.

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