How Much Power Does A Grow Tent Use

Tips to Lower Your Indoor Grow Room Electricity Costs

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Understanding Electricity Consumption for Indoor Growing

In comparison to the normal home, indoor grow rooms require a significant amount of electricity. Develop lights, ventilation, water, and climate-controlled growing conditions are required for fruits, vegetables, and other plants in order to produce photosynthesis and grow in a healthy manner. These grow lights and climate control systems, on the other hand, are quite strong and require a significant amount of energy. Observation: According to experts, indoor growth consumes around ten times the amount of energy that a typical office building consumes on average.

The typical wattage of a single CFL light bulb is around 14 watts.

In terms of indoor grow room lighting, a 1200w LED bulb with a 4ft × 4ft grow coverage is a good option.

The consumption cost of this grow light is more than 85 times greater than the consumption cost of a conventional light bulb.

What can you do to minimize your power cost while growing marijuana now that you have a better grasp of how an indoor grow room might effect your energy consumption?

Audit Your Energy Use

First and foremost, you must establish how much power you are actually use to produce fruits, veggies, or other plants in order to reduce your electric cost. However, you may accomplish this on your own by following a few easy procedures for each of the gadgets in your grow room that consume energy. Calculate the number of Watt-Hours consumed in a day. A watt is a unit of power that indicates how much energy a gadget consumes in order to function. Calculating how much energy your grow room consumes will allow you to determine the amount of watts that are consumed each hour.

For example, if your grow room fan consumes 125 watts and you use it for two hours per day, it consumes 250 watt-hours per day, according to the Energy Star.

Convert Your Devices’ Watt-Hours Into Kilowatt-Hours

Because your energy bill will be measured in kilowatt-hours (kWh), you’ll need to divide the watt-hours you calculated in the previous step by 1000 to get an accurate estimate of your power use.

The grow room fan in the above example would consume 0.250 kWh per day, or 0.250 watts.

Determine Your Usage Per Month

As soon as you’ve determined the amount of kilowatt-hours your devices consume each day, you’ll need to multiply the number of kilowatt-hours by the number of days in the month that are shown on your energy bill. This will assist you in determining how much energy was spent by these gadgets during that particular month. If you were to calculate energy use for the month of March, for example, the grow room fan would consume 7.5 kWh of electricity during that month. Determine the amount of kilowatt-hours that each of your gadgets consumes for the duration of the month, and then go to the last stage.

  • You may use one of two methods to calculate your monthly kWh consumption: remove the whole amount of energy consumed from your bill or multiply the total amount of energy used by your electric rate.
  • Please keep in mind that while power rates vary from state to state and area to region, the average electricity rate in the United States in January 2020 is 13.19 cents per kilowatt-hour.
  • The data will show you just how much energy your expanding organization is consuming, as well as how much that usage is costing you in terms of dollars.
  • Once you’ve determined whether or not it’s excessive, you may look into approaches to make improvements and lessen your power expense while developing.

Choose Energy-Efficient Lights

If you want to find out how much electricity your grow lights use each month, you may do so by following the procedures described above. The next step is to select energy-efficient lighting such as LEDs and compact fluorescent lamps (CCMs).

LED Lights

Consider upgrading to energy-efficient LED grow lights for your grow room if you want to lower the amount of energy you use in your growing environment. The same light intensity of higher wattage HID lights may be achieved with LEDs while creating less heat as a result of their use. Because there will be less heat, you will not need to operate as much ventilation and cooling equipment to keep your grow area at a comfortable temperature. It follows that your energy consumption rate will decrease even further as a result.

Switching from high-intensity discharge (HID) to low-intensity discharge (LED) lighting is an excellent strategy to reduce your power cost.

CMH Lights

CMH lights are more expensive up front than standard MH lights, but they utilize less energy, resulting in a reduced overall power bill in the long run. CMH lights are more efficient than MH lights when it comes to producing PAR light, which is the measurement of light that is needed for photosynthesis.

That implies, for example, that a 315w CMH light will provide the same amount of light as a 600w MH light. CMH lights also operate at a far lower temperature than MH lights. As a result, you won’t need as much cooling equipment, which will result in a cheaper total electricity bill.

Determine How Much You Need to Grow

Once you’ve decided how much energy your grow room consumes, you’ll need to figure out how big you want your garden to be. Considering how much you need to expand is quite significant when planning your strategy. In the event that you’ve already had a few good grows, you should ask yourself the following question: Do I really need as many plants as I’m now growing? If this is the case, consider how you might be able to reduce the size of your garden. Because there are fewer plants, there is less need for lighting and cooling equipment.

Check Your Grow Room Insulation

Make sure your grow room is properly insulated and consider what will work best for it as another simple way to reduce your electric bill when growing. Heat, for example, is necessary during the germination period of plant growth, and it helps to ensure that your seedlings live and flourish. You must ensure that your grow room is appropriately insulated in order to provide your plants with the warmth they require while not spending money on electricity. Insulation not only encourages development and adds to the humidity that is necessary for plant survival, but it also helps to maintain the temperature of the grow space.

The windows, doors, and vents in your grow room should be well-insulated so that neither heat nor cold air can escape or enter your grow room, causing your HVAC system to work harder than it should.

It is also critical to ensure that your pipes are adequately insulated.

Verify that your insulation is in proper working order, and that external climatic conditions are not impacting your grow room from outside the growth area.

Check Your Airflow Efficiency

It is critical for the health of your plants that the ventilation in your grow room be maintained. You want to be able to regulate the temperature, as well as the humidity, scents, and air movement, so that everything is exactly perfect. Some growers make the error of selecting the incorrect fans or employing an excessive number of fans. In the end, these two crucial errors result in a large increase in energy usage as well as in power bills. By being a little more smart when it comes to ventilation in your grow room, you may prevent exorbitant expenditures and minimize your utility bill.

Choosing the Right Fans

While it may appear more cost-effective to utilize inexpensive clip-on or tabletop fans that cost less than $20 per unit, utilizing a large number of these fans may increase your power bill significantly. Rather of employing a large number of smaller fans, it is really more cost-effective to invest in a single large fan with a high output. For example, if you’re using a 2ft x 4ft x 5ft tent — such as the Yield Lab Reflective Grow Tent — you’ll be better off using either a 390 CFM fan or a 440 CFM fan rather than five or six smaller clip fans to circulate air through the tent.

The place where you’ll see the most savings, though, is on your power bill.

A 440 CFM fan will consume around 150 to 170 watts of electricity. Using six to eight smaller fans to generate the same amount of cooling, on the other hand, can consume more than 200 watts of power. All of this adds up over time, as does the expense of your electricity bill.

Don’t Use Too Many Fans

Growing enthusiasts assume that utilizing a large number of fans would chill the air in their grow room, and as a result, they acquire a number of little fans. This results in high energy expenditures for their plants while providing only marginal advantages to them. Instead, you should invest in a solid system for exhausting heat and a single exhaust fan for your grow room, which will save you time and money.

Lowering Your Energy Bill When Growing Plants

The majority of people, regardless of whether or not they cultivate plants, are interested in minimizing their energy bills. In spite of these considerations, some of you may be reluctant to implement the recommendations in this article because you are concerned that decreasing your energy use would have a detrimental impact on the quality of your plants. Fortunately, this isn’t the situation. Your ability to maintain the quality of your plants will depend on your choice of LED or CMH grow lights as well as your exhaust fans.

If you wish to reduce your energy expenditures when producing fruits, vegetables, or other plants, you should consider implementing some of the suggestions in this article.

Question: How Much Money In Electricity Does A Grow Tent With A 600W Hid Use

Daily electricity use costs $0.2735236 or $8.20 per month, based on a 365-day year. I can calculate that if I had a HID (high intensity discharge) light with a 600 watt bulb in it, it will cost me $30.90 per month using the same technique of computation as above.

How much does a 600 watt grow light cost to run?

Daily electricity use costs $0.2735236 or $8.20 per month, assuming that the lights are on all the time. It would cost me $30.90 a month if I used the same technique of calculation to calculate the cost of a HID (high intensity discharge) light with a 600 watt bulb.

How much does it cost to run a 600 watt HPS?

Increase in Grow Light Operation Costs1000-watt sodium 600-watt sodium Ballast Wattage 1100-665 watts Cost each month $52.80 $31.92 $31.92 per month Initial Lumens 130000 89000 Mean Lumens 126000 81000 Initial Lumens 130000 89000

How much does it cost to run a grow room?

Costs of a typical commercial grow room installation. It is estimated that the typical start-up cost for a large-scale cannabis grow facility is $42 per square foot, according to Marijuana Business Daily. These typical prices, however, might vary significantly when you take into consideration the various types of facilities and production methods available.

How many kWh does a 600w light use?

1x 600 watt high-pressure steam generator running for 5 hours = 3000 watts 3000 watts is equal to 3 kilowatts. 3 kilowatts at 12p per kilowatt is 36p for every 5 hours, so if you are working 18 hours on and 6 hours off, it would come out to somewhat more than £1.50 each day. 23rd of September, 2012

How much is 600w per hour?

Converting Watts to Kilowatt-Hours is a common conversion.

Watts are units of power. Kilowatt-hours are units of energy. 500 W 0.5 kWh of electricity costs 500 cents. 600 W 0.6 kWh $0.060 per hour $0.072 per hour 600 W 0.6 kWh 700 watts 0.7 kilowatt-hour 800 W 0.8 kWh $0.096 per hr $0.084 per hr 800 W 0.8 kWh $0.096 per hr

How much does it cost to run 1000W per hour?

Calculator for Electric Heating and Electricity Costs Power consumption per hour per day* 500 watts £0.56 for a 500W at 9.27p 3kWh x 800W = 3kWh x 800W £0.89 / 14.83p / 800W 4.8kWh x 1000W = 4.8kWh 1000W (1kW) 18.54p for 1000W, £1.11 for 6kWh, and 1200W (1.2kW) 22.25p 1200W £1.33 7.2kWh 22.25p 1200W

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How much electricity does a grow tent use?

How Much Electricity Does a Cannabis Growing Facility Consume? Indoor commercial cannabis cultivation (also known as a cannabis grow room), according to the Northwest Power and Conservation Council (NPCC), has the potential to spend between 2000 and 3000 kilowatt hours (kWh) of energy per pound of finished product.

Do LED lights raise electric bill?

Is converting to LEDs a good investment because of the energy savings on the power bill? Yes! LED lights consume 80-90 percent less energy than incandescent bulbs and may last up to 100,000 hours, compared to 3,000 hours for an incandescent bulb. LED lights also have a longer life span of up to 100,000 hours. When you combine this with the long-lasting design of LEDs, you may save money on more than just electricity.

How much energy does a 50 W bulb consume in four hours?

The amount of energy utilized in four hours is 720 J.

How much heat does a 600 watt HPS produce?

If you have a 600-watt high-pressure sodium lamp, the BTUs produced by that luminaire are the same as those produced by a 600-watt LED. According to the British Thermal Unit (BTU), one watt of electricity equals 3.41 BTUs, hence a 600W luminaire will generate 2,046 BTUs.

How much does it cost to run an LED light bulb for 24 hours?

Calculating the Wattage and the Usage To put it another way, leaving the lights on all day will cost you: 30 bulbs times 0.06 (60 watts / 1000) kilowatts multiplied by 24 hours multiplied by 12 cents or $5.2 a day.

How much power does a 2000 watt LED grow light use?

The entire amount of electricity consumed is around 300 watts. The lamp has a covering area of 3 by 3 feet and produces approximately the same amount of light as a 400 watt high-pressure sodium bulb.

How much does a 1000w LED light cost to run?

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.

How many plants do I need for a 600 watt HPS?

Sixteen plants grown under a 600-watt high-pressure sodium lamp (HPS) could generate around 37.5 grams (1.3 oz) of marijuana each plant. Plants may produce yields of up to 500 grams (17.5 oz) per plant when grown in ideal outdoor circumstances.

How much does it cost to run a small grow tent?

The national average is around $0.13 per kWh of electricity consumed. During the vegetative stage, a 320-watt LED grow lamp is likely to consume over 6 kilowatt hours each day on average. During flowering, the same light consumes over 4 kilowatt hours of electricity every day. Electricity costs for this single grow light are around $4 per week in total, based on average usage.

How much area does a 1000W HPS cover?

Plants of a Large Size The lights with 400 and 1000 watts of power are the most useful.

When suspended 2 feet above the plants, a 1000 watt grow light can illuminate an area of approximately 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.

How much heat does a 1000w led grow light produce?

Calculating the Heat Production Produced by Grow Lights As previously stated, this is true regardless of the type of light being used – whether it is an LED, an HPS, an MH, or any other. As a result, a 1,000-watt high-pressure sodium (HPS) grow lamp (1,060-watt with ballast loss) creates 3,617 BTU of heat per hour.

How much area will a 600-watt HPS cover?

HPS grow lights with a power output of 600 watts are the most efficient HPS grow lights available. 600W high-pressure sodium (HPS) grow lights generate more light per watt consumed than other wattages and cover an area of approximately 36 square feet.

What is the best wattage for grow lights?

Having determined the type of plant grow light you want, the next step is to determine how large a bulb you will require for the available area. In order to begin, you must first establish how much space you will be illuminating. As a general guideline, you should aim for 20 to 40 watts per square foot.

How much power does a 100W LED use?

In a year in which you use your lights for 4,320 hours (12 hours per day, 360 days per year), a 100W PAR38 would consume 432 kWh and a 14W LED PAR38 would consume little more than 60 kWh, respectively, if you use the 100W PAR38.

How many plants can 1000 watts grow?

Everyone has their own approach, and in the end, it all comes down to what works best for you. However, I have heard that the majority of people use 6-9 plants per 1000W, while some prefer to have more smaller plants, which is why the sog and scrog method was developed. SeeMoreBuds, for example, had around 50-100 plants every 1000W of power.

Do LED Grow Lights Use A Lot Of Electricity? (The Real Answer—No Hype)

Are you aware that LED grow lights consume virtually little power? As a result, they have essentially no operating expenses. You’ll save a significant amount of money! Please accept my apologies for delivering awful news. You’ll still have to pay your power bill, though. You’ll have a significant electrical cost if you have a large enough grow room to accommodate your growing needs. So why does everyone keep harping on the fact that LED grow lights are far less expensive to operate? For the simple reason that it is less expensive.

Furthermore, LED producers have a strong tendency to overstate.

Do LED Grow Lights Use A Lot Of Electricity?

It is dependent on the lighting conditions. A high-intensity LED grow light consumes a significant amount of electricity. However, it consumes less energy than other types of light that provide the same amount of output. They are more energy efficient than any other sort of lighting, which means that you will spend less money on electricity to get the same outcomes as you would with other types of lighting. However, you will still have a significant monthly electricity expense. It just will not be as noticeable as it would be with HID lights or any other sort of lighting.

Let’s take a deeper look at what’s going on.

How Much Electricity Do LED Grow Lights Use?

Understanding how much power an LED grow light consumes is not difficult to figure out.

Finding all of the information necessary to perform a computation is the most difficult component of this process. Not only that, but it isn’t even that difficult because you only require two pieces of information, both of which are readily available:

  • The actual wattage of the light
  • The number of hours per day that the light is on
  • And other pertinent information.

The real power consumption of a light should be straightforward to determine. Any credible manufacturer will be able to supply this information upon request. To demonstrate this, let’s pick one of the most popular lights on the market and run through it using it as an example. We’ll be using the Spider Farmer SF4000 for this. We have a look at the Spider Farmer lights in this article. 404 watts is the power consumption of the SF 4000, as can be seen in the table in that evaluation. Because electricity providers measure in kilowatts (kw) per hour, we must convert 404 watts to kilowatts per hour (kw/h).

  1. This results in a power demand of 0.404 kilowatt-hours.
  2. Growing marijuana requires your lights to be on for 18 hours per day during vegging and 12 hours per day during flowering, according to the National Cannabis Industry Association.
  3. In the case of the SF 4000, which we are using for this calculation, the dimmer allows you to lower the power consumption, which is something that you would want to do while you are vegging.
  4. This indicates that the light is operating at maximum power (0.404 kw/h) and that it is operational for 12 hours every day.
  5. In this case, we have a total power usage of 4.8448 kilowatt hours.

How Much Does It Cost To Run An LED Grow Light?

You’ll need one more piece of information before you can figure out how much it will cost: your power tariff. This information may be seen on your electricity bill. For those who don’t have one, or who don’t want to bother looking for one, you can input your zip code on this website: According to the Energy Information Administration, the average price of energy in the United States is 12.83 cents per kilowatt hour, or $0.1283 per kwh. This is the number that we will utilize in our calculations.

To get an idea of the monthly cost, multiply the amount by 30.

Let’s examine how it compares to the performance of an equivalent HID lamp.

How Much Money Does An LED Grow Light Save?

It is approximately comparable to an 800 watt HID light, yet the majority of people use it to replace a 1000 watt HID system, as seen in the table below. In order to be on the safe side, let’s utilize the lesser integer for this computation instead of 1. We will repeat the calculation with 800 watts, which is.800 kw/h.800 kw/h for 12 hours a day is 9.6 kwh. We will repeat the calculation with 800 watts, which is.800 kw/h. In our example, we use the same power cost, which results in a daily expense of 9.6 Kwh x $0.1283/kwh = $0.2317.

Taking our above-mentioned LED number ($18.66) and subtracting it from $36.95, we obtain a monthly savings of $18.29 for this single LED grow light.

If you use the SF 4000 to replace a 1000 watt HID light, you will save much more money. Furthermore, these are only the reductions in electricity bills. The use of LED plant lights can also save you money in a variety of different ways.

Additional Cost Savings Of LED Grow Lights

LED grow lights save money in a variety of ways, one of which is through decreased power use. They also save money since they produce less heat and have a longer lifespan. To begin, let’s look at the first one. You will not have to do as much effort to keep your grow room cool as you will if your heat output is smaller. The amount of ventilation equipment you purchase and the amount of electricity required to power that equipment will both be reduced significantly. During the summer, HID lights are typically used in conjunction with an air conditioning unit.

  • As a result, there is a significant reduction in power consumption.
  • If you are utilizing horticulture LED lighting in a cold region, you may find that you need to heat your grow room since the heat from the HID lights is lost to the environment.
  • The longer the lifespan, the more money may be saved on costs.
  • Because of the extended lifespan, you will not have to change your bulbs every six months to a year as you would would.
  • The money you save by not having to purchase replacement bulbs on a regular basis adds up quickly.
  • It is a significant advantage of LED lighting because you may obtain the precise spectrum you choose, and the finest manufacturers have tuned their lights to provide the optimal spectrum for plant development.
  • In addition, your yields will improve in terms of both size and quality, as a result of the increased productivity.
  • The goal is to choose an LED grow light that not only has the right spectrum for plants, but is also very efficient.

Which LED Grow Lights Save The Most Money?

Obviously, individuals that consume the least amount of electricity save the most money. However, that is not an effective response. What you actually want is a lamp that produces the highest amount of light while consuming the least amount of electricity. In other words, you want the brightest, most energy-efficient light available. You also want it to have the optimal spectrum for photosynthesis in plants. The most energy-efficient lights available on the market today are those that make use of COB LEDs and those that make use of quantum circuit boards.

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Which one you like is a matter of personal preference.

They also do not require fans, which allows them to operate in complete silence.

If you prefer not to read and are only interested in the conclusion, the Phlizon COB fixtures are the most cost-effective option.

Spider Farmer fixtures are the finest value for money when it comes to quantum board lights. For those who don’t mind spending a little extra money, the Horticulture Lighting Group is the firm that popularized the quantum board type of lighting in the first place.

How to calculate the electricity costs for growing cannabis indoors –

If you’re planning an indoor grow, you’ll want to figure out how much electricity you’ll need so that you don’t have any unpleasant surprises further down the road. Learn how to calculate the electrical expenses associated with producing marijuana indoors. If you’re planning an indoor grow, you’ll want to figure out how much electricity you’ll need so that you don’t have any unpleasant surprises further down the road. The following are some preliminary estimations of the cost of energy for producing marijuana indoors.

Many people, however, believe that a normal 400W high-pressure sodium lamp (HPS) is a decent starting point for a basic interior lighting setup.


Imagine we have a modest grow tent with one 400W high-pressure sodium lamp, and the vegetative stage lasts 4 weeks, followed by an 8-week flowering period. This is a simple illustration of how much it costs to run a small indoor grow setup, and it is also an accurate representation of the expenditures. In a simple growtent, you’ll need a number of equipment that require energy, including:

  • LAMP. At the present, high-pressure sodium lamps (HPS) are the most often utilized light source in indoor grow systems. During the first four weeks, your lamp will be on for around 18 hours every day (given you stick to a regular 18-6 light cycle). In the following weeks, during the blossoming phase, your light will operate 12 hours each day for approximately 8 weeks
  • BALLAST. When a high-pressure sodium lamp (HPS lamp) is turned on, the ballast (or current regulator) consumes around 15 percent of the total power of the lamp
  • EXTRACTOR FAN. This component ensures that fresh air is brought into the tent by sucking it in via the ventilation holes at the bottom of the tent. In conjunction with a filter, odorless air will depart the tent through the top of the structure. Throughout the process, the extractor fan will be running (24 hours a day, 7 days a week, for the full 12 weeks). In typically, an extractor consumes around 30 watts of power
  • FAN. It is vital to have a fan in order to move the appropriate amount of air. In addition, your fan will be running for the entire 12 weeks. The majority of fans require around 20 watts of power.

Kilowatt hours are typically used to assess electricity prices in the United States. To figure this out, simply add up the total amount of watt hours generated by all of your equipment and divide it by 1000. (one kilowatt is 1000 watts). This will provide you with an estimate of the total number of kilowatt hours of power that your grow room will require. Now, let’s do a little mathematics:

  • The lamp’s vegetative period is equal to (28 days x 18 hours) x 400W, which equals 201600 watt hours. watt hours required for lamp flowering: (56 days x 12 hours) x 400W = 268800 watt hours watt hours used by ballast: 15% of (201600 + 268800) = 70560 watt hours Extractor: 60480 watt hours (12 weeks: 84 days x 24 hours) x 30 watts (12 weeks: 84 days x 24 hours) A 20-watt fan will consume 40320 watt-hours over the course of 12 weeks (84 days x 24 hours). There are 641760 watt hours in total
  • 555.360 watt hours divided by 1,000 equals 641.76 kilowatt hours.

If you want to figure out how much money you’ll save by doing this, simply take the average price of a kilowatt hour in your region (in our instance, it’s 0.21€, or around $0.24 US) and multiply it by the entire number of kilowatt hours you determined previously. As a result, the total power expenses for operating the aforementioned indoor grow room are 641.76 x 0.21 = 134.77€ (about $150).


It’s important to remember that these figures are based on educated guesses. Even though the specific wattage of your equipment will vary from one manufacturer to another, the amounts shown here are quite consistent. Apart from that, you may opt to employ alternative light cycles and leave your plants in theirvegetative and floweringphases for longer or shorter periods of time, which will have an impact on the total cost of cultivation. In any case, these statistics provide as a solid starting point for determining how much it costs to operate a normal personal indoor grow setup.

How Many Watts Do You Need to Grow Indoors?

Many people believe that in order to successfully cultivate hemp indoors, you must use a 1000 watt artificial light. However, the fact is that you can effectively grow medicinal herbs with far less power, allowing you to save money on your electricity bill while still developing stronger plants.

To answer the question, how much watts do you actually require to grow indoors? Consider this fallacy about short day plant growth, as well as how you may grow inside using environmentally responsible (and wallet-friendly) LED grow lights.

Where the myth that you need 1000W to grow hemp comes from

High Pressure Sodium (HPS) lamps were often used to grow anything indoors back in the day, and the notion that we needed 1000 watts of power to grow hemp dates back to that time period. Back then, HPS lights were the only good artificial light sources available, and a 1000 watt light was required to produce enough photosynthetic light spectrum to meet the needs of the growing environment. With high-pressure sodium (HPS) and other high-intensity discharge (HID) lights, the primary concern is that they waste up to 60% of the energy they require merely on heat production.

Those 400W are also providing a somewhat narrow grow light spectrum, which means your plants are not receiving the right amount of light they require.

How much wattage do you need to grow indoors?

The short answer is that wattage isn’t actually that important. Wattage is a unit of measurement for power consumption, and while it’s useful to know how much wattage your grow light consumes (in order to make a more cost-effective, energy-saving option), it has nothing to do with the amount of energy your plants require to develop. The wavelength spectrum of a grow light, which is measured in micromoles(?mol), is considerably more crucial to comprehend than how much watts a grow light consumes.

The Cannabaceae family of plants is at the higher end of the spectrum: they require 800?mol to develop up to 85 percent of their natural capacity, and 1300?mol to grow up to 100 percent.

In order to estimate the intensity of your grow light in moles per watt of light spectrum between 400 and 700 nanometers (nm), or in other words, for any light spectrum that’s acceptable for growing plants, you may use a PAR meter.

Can you use too much light to grow indoors?

Yes. Your plants can burn or bleach if you expose them to too much light in the same way that a human might. Increasing the wattage may result in greater light output, but it also increases the amount of heat produced, which may result in burned plants. Plants can experience photoinhibition if their grow light has an output more than 1300?mol. This occurs when plants begin to use more energy on eliminating surplus light rather than on developing their maximum potential. Consequently, you’ll get wilted, brown foliage, and withering plants as a result of this.

How Many Watt Per Square Foot (Sq Ft) For Cannabis?

The proper number of LED grow lights, or rather the power of LED grow lights, for indoor growing may be approximated using the w/sq ft (watts per square foot, or square meter) concept, which is defined as one watt per square foot, or one square meter. Because the light output of LED grow lights is inversely proportional to the amount of power consumed (watt), designing the light setup for a grow area using standard watts per square foot (w/sqft) recommendations is a quick and simple approach to assess one’s light requirements.

  • Choose an LED grow lamp with the appropriate wattage for your grow space by calculating the watts per square foot (watts/sq ft).
  • Providing that the bulbs are of equivalent quality when compared to one another, this can be a simple and helpful strategy.
  • Some lamp types perform substantially better than others (operate at greater efficacy, PPE, or mol/J) and will take fewer watts to output the same amount of light, therefore compare apples to apples and oranges to oranges when evaluating lamp performance and efficiency.
  • For example, two lamps that both demand 100W, but one works at an efficacy of PPE of 1.0 mol/J and the other operates at an efficacy of PPE of 2.0 mol/J, respectively.
  • In other words, the second lamp will provide double the amount of light as the first lamp while consuming the same amount of energy as the first (watts).
  • Then follow the “rule” that has been created for how much electricity a specific grow area requires.
  • This might be accomplished with either a single lamp or a group of lamps.
  • This might be accomplished with either a single lamp or a group of lamps.
  • Under their natural state, plants will grow in less-than-ideal conditions, but perhaps not to their complete capacity.
  • Further lowering the light to 150W or 100W would, on the other hand, result in a considerable reduction in yield.

On the other hand, raising the watts per square foot over the recommended level might theoretically boost the yield, however the gain may be minor or even insignificant in comparison. But there’s more to it than that.

Want to Setup a Marijuana Grow Room? Here are the Costs

With legal medicinal marijuana now available in 33 states and the District of Columbia, the sector is poised for a golden era of growth. In fact, there are so many commercial producers that certain areas, such as Oregon, have a huge excess of the crop. It was estimated that the worldwide legal marijuana market was worth around $9.5 billion per year in 2017, with the United States accounting for 90 percent of that total. By 2025, Grand View Research estimates that the worldwide market would have grown to more than $146 billion per year in value.

According to the Cannabis Business Plan website, the average commercial company incurs expenditures of $830,000 per year!

If you reside in a state where it is legal to cultivate marijuana at home, you won’t have to worry about such things.

In this article, we’ll take a quick look at the costs associated with setting up an indoor marijuana grow room at your house or apartment.

Building Your Grow Room

Keeping things simple when it comes to setting up an indoor grow is the best course of action. It should go without saying that you mustpurchase feminized seeds, or use cuttings from a female ‘mother’ plant. If you purchase regular seeds, half of them will become male plants. Even though male plants are useful in some situations, they will not produce the resinous, cannabinoid-rich buds that you desire. Depending on where you live, seeds can be purchased for anywhere from $10 to $20 per packet.

A 10-pack should cost 20 percent or so less per seed.

Grow Tent

The most straightforward method of growing cannabis at home is to get a grow tent. They have been particularly built for marijuana cultivation, are simple to build, and will do no damage to your property while in use. It will cost roughly $120 to purchase a two by two-foot (2′ x 2′) tent that will hold a maximum of three plants. A 3′ by 3′ tent, which can accommodate up to four plants, may cost more than $200 to purchase. Larger tents might cost more than $300.

See also:  How To Make A Homemade Tent For Inside


If you want to utilize a hydroponics system, you will need to acquire an inert growth medium such as coco coir or rockwool, as well as ensure that your crop receives all of the nutrients it requires.

The cost of the system as a whole is determined by the ‘type’ you select. For example, a 12-plant watering system may cost more than $500, but there are less expensive solutions that cost less than $200.


A super soilmix can cost anywhere from $20 and $50, and there are fertilizer packages available for purchase for upwards of $80. According to one school of thinking, professional soil and nutrient mixes are a better choice than natural plant soil since they contain less toxins.


Because your plants will not receive the benefits of natural sunshine while growing indoors, it is your job to ensure that they receive the amount of light they require. Your plants should be exposed to at least 18 hours of light every day when in the vegetative stage. During flowering, the length of time decreases to 12 hours. There are a multitude of grow light alternatives available, each with a different price and power rating. Compact Fluorescent Lights (CFLs), for example, are the least powerful but are ideal for tiny grow rooms since they are inexpensive and may be purchased for as little as $50 for 200 Watts, depending on the wavelength spectrum.

  • For example, a 140-watt lamp can cost more than $300, yet it is significantly more ‘energy efficient’ than compact fluorescent lights (CFLs).
  • Hopefully, you will be able to create one gram per watt of power.
  • Electricity expenses are more difficult to assess since the cost varies from one region of the United States to another.
  • During the vegetative stage, a 320-watt LED grow lamp is likely to consume over 6 kilowatt hours each day on average.
  • Electricity costs for this single grow light are around $4 per week in total, based on average usage.

Carbon Filters

Filters are not required, however they do help to purify the air and reduce the odor of marijuana. For a filter and duct fan combo, expect to pay well over $100 in most cases. Clip fans are also required to keep your grow tent closed and to circulate the air within it; they cost around $30.

Other Equipment

If you plan to use soil, you will also need to acquire a variety of different-sized pots. When your plant matures, you’ll need to move it to a larger container to continue growing. You’ll also need to acquire some dirt. For those interested in experimenting with the Screen of Green (SCROG) or Sea of Green (SOG) growth methods, there is also the option to purchase additional gear like as stakes, zip ties, and screens. In addition, we recommend that you get a pH testing kit. It is important to note that if the pH of your crop’s growth medium is beyond the range of 6.0 to 6.8 (5.5 to 6.5 for hydroponics), the plants’ capacity to absorb nutrients will be hindered.

You should also consider purchasing a digital timer, which costs around $25.

Because temperature and humidity are so important in marijuana cultivation, invest in a thermometer and a hygrometer, or an all-in-one gadget that can measure both.

They are available for purchase for for $10. You may want to consider purchasing a reverse osmosis system to filter your water if you reside in a region where the water is unsuitable for growing marijuana. The cost might range anywhere from $150 to hundreds of dollars depending on the situation.

Labor Costs

How much time do you devote to caring for your marijuana plants? Take a look at how much you get paid per hour for the task you do. In the event that it works out to be roughly $20 a day, it corresponds to $1,400 over the course of a 10-week growth period.

Final Thoughts on Setting Up a Grow Room

With the most basic of setups, you can start growing marijuana at home indoors for less than $2,000, making it a very affordable option. The most significant advantage is that you may reap numerous harvests each year, and the majority of the equipment you purchase can be re-purposed several times. Smaller installations may only yield 200 grams, which equates to around $10 every gram produced. You should be able to find pot for that amount or less in a dispensary, however the price may vary depending on the strain.

  1. Consider the following scenario: you spend $4,000 on your setup throughout the course of the year, but you only generate roughly 1,000 grams of marijuana.
  2. In addition, Canadian firms are already offering’starter kits’ for less than $500.
  3. In addition, you must consider the cost of power, yet this is a fantastic offer nonetheless.
  4. Growers have a lot greater understanding of the plant than those who merely purchase marijuana from a dispensary on a regular basis.

Amps, Watts & Volts: Preparing Home Circuitry for a Growroom

Making mistakes with the electrical wiring in an agrowroom may be both expensive and, more importantly, harmful. Lighting systems consume a significant quantity of energy, and the more the amount of energy consumed, the greater the amount of heat created. When any appliance or lighting system consumes a substantial amount of electricity, the wiring must be appropriately designed and installed so that the surplus heat does not constitute a safety hazard to the user. Electrical fires can occur, albeit infrequently, and are significantly more likely to occur in an electrical system that has been poorly planned and performed than in one that has been correctly planned and implemented.

  • Incorrect wiring can result in the damage or destruction of expensive equipment such as ballasts, fans, lights, and anything else that plugs into an electrical outlet.
  • When it comes to setting up a properly wired garden, all you really need is a fundamental awareness of several often used electrical concepts as they apply to indoor gardening.
  • A professional electrician should be recruited in other circumstances; you may utilize your basic understanding to express clearly what electrical demands will be required in the garden.
  • The three most prevalent electrical terminologies used by indoor growers are amps, watts and volts.
  • Put another way, the amount of watts necessary, divided by the operating voltage, will determine the required current or amps.

A subpanel circuit breaker is a smaller service panel that is responsible for distributing electricity to a particular region. Photograph courtesy of Nipol Plobmuang/Shutterstock


The most effective method to think about amps (also known as amperes) is to think about current flow. A excellent analogue is a water distribution and distribution system. The amps would be equivalent to the flow rate of water via the water pipes in the building. The quantity of power that is accessible to the electrical system will be determined by the flow rate of amps. For indoor horticulturists, the amount of lights that may be run is determined by the number of available amps. An electrician may be required to enhance the available amperage on the electrical service if the home or building’s electrical service does not have enough available amperage for the garden under certain circumstances.

For want of a better expression, the flow rate of power is insufficient to support all of the gadgets and the requirements of the indoor garden.

So, how can a gardener decide how many amps he or she will require for his or her garden?


When discussing watts in the context of horticulture, what is being addressed is the amount of electricity required or utilized. The wattage of a garden is often proportional to the size of the garden. As an illustration, a 10,000-watt garden would have a green space that is approximately ten times the size of a 1,000-watt garden, for example. The majority of growers employ an equation to determine the amount of watts required for their specific locations. Consider the following scenario: you want to install horticultural lights in a 1010 garden space.

  1. Indoor horticulturists often utilize watts as a tool to assess their gardens’ overall efficiency.
  2. A garden’s efficiency and return on investment are both enhanced when the weight per watt of energy spent is greater.
  3. Wattage is a unit of measurement that can be used to define the amount of power required.
  4. In the horticulture lighting industry, PAR (photosynthetically active radiation) per watt is a typical means of expressing lighting efficiency.
  5. In order for novice growers to be successful, it is critical that they grasp the PAR per watt of energy ratio.

This is now the most effective method of comparing the effectiveness of various light systems. Using a digital multimeter, I checked the voltage in the house. Photograph courtesy of New Africa/Shutterstock


When estimating how many amps are required, it is also necessary to consider the voltage of the lighting system in question. The greater the voltage, the less amps are required to run the gadget, and vice versa. Currently, there is a great deal of misunderstanding regarding how operating a ballast on 120-volts vs 240-volts can influence a grower’s electricity cost. Many farmers are under the impression that switching to 240 volts will lower their power use by half and, as a result, their electricity expense by half.

  1. While increasing the operating voltage will result in a reduction in the number of amps (current) required, the quantity of power (watts) required will stay constant.
  2. If the same 1,000-watt lighting system is run at 240 volts, the grower will only require 4.16 amps of available power to do the same task.
  3. With 240-volt operation, you can run twice as many lighting systems on the available amperage as you can with 120-volt operation.
  4. The lighting system will still require 1,000 watts of power regardless of the voltage used (power).
  5. Power providers charge users based on the amount of electricity they consume.

Specialized Systems

There are a variety of electrical equipment designed expressly to make the job of an indoor horticulture much simpler. There are electrical boxes available that do not require the services of a certified electrician and are meant to be plugged into an existing dryer or range outlet. Using these simple gadgets, farmers may securely run additional ballasts by using 240 volts (which is usually used for dryers and stoves), which is more convenient for them. There are a plethora of additional pre-made gadgets available to meet the demands of indoor growers.

Similarly to preparing any other aspect of an indoor growroom, the more your understanding of exactly what is required, the easier it will be to identify the specific supplies that will match those requirements in the first place.

Consumers should never be hesitant to ask questions, especially if the answers may have an impact on how their growroom operates. (See also: How to Select the Most Appropriate Grow Lights.)

Do I Need a Dedicated Circuit for Horticultural Lighting?

It is preferred that the garden’s horticultural lighting system(s) be operated on a dedicated circuit, which is a circuit that is utilized just by the indoor growroom and does not have any other appliances or electrical equipment attached to it. This is a basic and straightforward method of avoiding blown fuses and other possible hazards. When electrical difficulties do develop, it makes it much easier to diagnose the problem. Extra Amps Are Always a Good Thing It is preferable to have a few additional amps available on the lighting circuit rather than straining it to its absolute maximum.

Growers who add additional amps to their electrical systems are effectively extending the life of the system and boosting its overall safety.

When I was assisting in the construction of growrooms for my store’s clients, I made it a point to include additional amps in the design.

Having more amps is not only safer, but it also makes future growth more straightforward.

Beyond the possible risks involved with negligent wiring, a grower can never be successful if their electrical system is not properly maintained and maintained at all times.

An indoor garden that is correctly wired is essential for safety, efficiency, and success, regardless of whether you utilize a pre-made horticultural electrical system or engage an electrician.

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