How Much Electricity Do Grow Lights Use? | Are They Energy-Efficient?

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by Morgan

Last update:

August 29, 2023

How To Choose The Right Lighting For Your Marijuana Grow Room

You must have heard about how low-cost LED grow lights are and how easy it is to set up and maintain. However, if you have a larger grow room, you'll have a hefty monthly power bill. Many individuals use LED lights for domestic use to grow plants, especially seedlings. 

The majority of grow lights are designed to be energy-efficient. Therefore, they will have a little impact on your electricity consumption. We'll also look at reducing electricity costs when you run led grow lights. How much electricity do grow lights use? To find out how much it costs to operate LED grow lights, here is the place to go!

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How Much Electricity Do Grow Lights Use - How Much Does a Grow Light Add to Electric Bill?

You know that light is plant nourishment when you're a plant lover, and plants can't thrive without it. Your plants will be healthier if you can supply them with as much light as possible. Grow lights increase the amount of light your plants receive, allowing them to grow more quickly, create larger leaves, and produce more carbohydrates for growth.

Consider the following facts to get an idea of how much money you might anticipate spending on grow lights each month:

The Wattage

Power consumption rises in direct proportion to wattage. It costs you $1.725USD a month to run a 30-watt grow light nonstop for 12 hours. A 50W grow light on the same hours per month will cost you $2.875.

All grow lights draw power. Watts measures their electricity usage (W). Be careful while selecting grow lights because many are too weak. Try to choose a grow light that will adequately light your plants without spiking your electricity bill.

The farther the grow light is from the plants, the less LED light will reach them. Strong, high-quality grow lights placed closer to the plant will boost. If the plant requires strong or medium light, this will also be a factor.

Row of plants under grow lights

Local Energy Cost

The last factor in determining the cost of your grow light electricity is how much you pay for power in your house or company. The cost will vary based on where you live and the electricity provider you're working with.

For instance, it costs you 0.16$ per kilowatt-hour to run your home's electrical system (kWh). It indicates that you are paying $0.16 per kilowatt-hour for every hour you consume electricity. Using 1,000 Watts equates to 1KW. Thus you'll pay 0.16$ per hour for every 1,000 W you use.

Use the following calculation to calculate the monthly cost of operating your grow lights: Total Kilowatts (KW) x Kilowatts Per Hour x Hours Per Day (days). You must divide the wattage by a factor of 1,000. (1,000 KW in 1 W).

If you were to use the kWh rate previously given to power a 1000 W grow light for 12 hours each day, the formula would be: 1 x $0.16 multiplied by 12 by 30 is $57.6 each month.

Using a Grow Light Electricity Calculator

The grow room electricity calculator considers several factors when calculating grow light costs. These include the type of lighting, hours per day, electricity cost, and quantity of lights. You can calculate how much power grow lights will require in seconds. It shows you actual expenses for growing houseplants with grow lights.

Flower vs. Veg Cycle

Grow light costs can be greatly affected by the number of hours you want to operate them each day. You'll spend more money each month during marijuana vegetative growth since your lights are on for longer periods (about 18-24 hours per day) than in blossom. You will run LED lights for about 12 hours per day in the flower growth. 

Type of Grow Light

The same cannot be said with grow lights. LED grow lights are a go-to choice because of their effectiveness and because they don't produce much heat. Only if you buy large LED lights that cover a lot of plants, like the Spider Farmer Grow Light, will you see a difference in your electricity cost. Check out Grow Light Finder if you're unsure what type of grow light to use.

Herb under light near a wall

Brand of Grow Light

Make sure you purchase from well-known brands to ensure that you get a warranty and high-quality products that are more efficient than those from unknown companies. A high-quality grow light will save you money in the long run because you won't have to replace it as frequently as you would with a lower-quality brand. GE, Sansi, and Rousseau are just a few of the well-known names in the industry.

Do Growing Lights Use a Lot of Electricity?

It varies according to the lighting conditions. For example, a high-powered LED grow-light consumes a lot of energy. However, it consumes less energy than other types of light that provide the same amount of brightness.

Isn't it true that LED grow lights consume less power? That implies they're almost free to operate, and you could save a ton of cash this way. Unfortunately, that is not the case as there will still be an electric bill.

LEDs save you money in the long run since they're more effective than any other light source. However, you'll still be paying a high monthly cost of running your grow lights. If you were using any other type of light like HID lights, it would be far larger.

How Much Does a 1000 Watt Grow Light Cost to Run?

It's not as complicated as figuring out how much power an LED grow light consumes. You need to know the grow light's wattage and how many hours a day it is on. You'll need to figure out how much power is being utilized by the device. The cost of electricity is expressed in kilowatt-hours. You must divide your wattage by a factor of 1,000. (1,000 KW in 1 watt).

If we utilize 800 watts as the real electrical power, the power draw is 0.8 kilowatts per hour. The charge per hour is calculated by multiplying your kilowatt-hour rate (found on your power bill) by 0.8. If you choose time-of-day pricing, your costs will fluctuate based on the day, resulting in a variable hourly rate.

Row of indoor plants under light

To arrive at the final figure, you must multiply the number of hours a day the lights are on by 0.8 KWh. That works out to a total of 19.2 kilowatt-hours consumed in 24 hours. Following that, it's important to know your power bill.

Is It Expensive to Run LED Grow Lights?

Plant lights may be a source of anxiety for some consumers, whose monthly utility bills are already rising. A powerful LED grow-light or many powerful LEDs will use a significant amount of your budget. When compared to high-intensity discharge (HID) lights, the cost to run the lights is significantly cheaper. LED lighting is among the most efficient methods to light up a grow room.

LED light bulbs have a longer lifespan, are more sturdy, and provide equivalent or greater light energy than other light types. Changing bulbs every six months to a year is no longer necessary because of the increased lifespan of LED light bulbs. You save a lot of money by not buying new bulbs all the time.

The bottom line is that you may profit from LED grow lights by not only saving money due to their cost-effectiveness. A significant advantage of LED lights is obtaining what you want in terms of spectrum. The leading manufacturers have made LED lights with the ideal spectrum for plant development in consideration.

Cannabis plant

Tips to Lower Your Indoor Grow Room Electricity Costs

If you're only growing a few plants, switching to grow lights won't impact your monthly electricity expenditure. There are methods to cut costs for those of us with an abundance of plants in our homes.

Switch to Energy-Efficient LED Grow Lights to Save Money

Switch to LED lights immediately if you're still using incandescent lights to save money. U.S. Department of Energy (DOE) research indicated that LED grow lights can reduce electricity consumption by up to 30 percent compared to the custom lighting technologies in horticulture applications.

Reduce Hours Grow Lights Are On

Suppose you're growing your plants under a grow light for 18 hours a day. Perhaps leaving the LED light on for 12 hours a day would be sufficient for the plants? The shortened hours should be fine if the leaves keep growing and developing. You'll pay less for power.

Inspect the Grow Room's Insulation

Insulate your grow room properly. You will keep your plants warm without wasting money. Heat is necessary for germination and plant survival, and growth. If you don't properly insulate the glow room, your HVAC system will have to work overtime, and you'll wind up spending more on electricity bills.

Switching to a Less Expensive Electricity Provider

You can save money by switching to a cheaper power provider if you live in a country or state with various providers.

If You Have Access to Natural Light, Make Use of It

Grow lights may not be necessary during sunny weather, and the plants are next to the windows. If this is the case, switch them off, even if only for a few hours. You could even program the LED lights to switch on and off using timers.

Should You Lower Your Electricity Bill When Growing Plants?

Plants need light to thrive. Do not allow a lack of light to deter you from having a variety. You may save money and gain a lot of power for your plants by using energy-efficient grow lights. A better understanding of what it costs to run LED grow lights is now in your hands.

The above strategies can help you grow more efficiently. The money you save by growing your plants indoors will blow your mind. If you're using LED lights, the price will vary based on the type and the number of lights. So, if you're serious about growing, you'll want to look around for the best LED grow lights available.

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About the author 


I discovered the benefits of Cannabis at a young age in 2002, with years of trial and error, my knowledge grew just like my plants. As my love for cannabis unfolded I began to teach and learn, trying to gain as much information and practical growing experience.

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