How much electricity does 1000 watt LED grow light use? 2020 Updated

What is the wattage [watts]?
The amount of power/energy consumed by light is measured in watts or wattage that indicates energy per unit time.

For example, A 50W light bulb uses energy equal to 50-watt-hours (W·h), or 180 kJ in one hour. A 100-watt light bulb would use an equal amount of energy within a half hours, or a 10-watt bulb for 5 hours.

Here’s the formula which can be used not only to figure out the cost of electricity for the grow lights for weed but also the cost per month:

Cost of Electricity x Number of Hours x (Watts / 1000) = Total Cost

Note: You need to divide the watts (W) by 1000 to plug it into the cost formula; this is to convert your number to kW so it plays nice with the kWh measurement you get from the electricity company.

Cost Electricity – $0.37/kWh (this is what we get charged for electricity, but it’s more than twice the average cost nationwide so you’d probably pay far less than this!)
Number Hours: 1,746 light hours (total hours with 250W HPS turned on)
Veg: 41 days of 18/6 = 738 hours
Flower: 84 days of 12/12 = 1,008 hours
Wattage/1000: I used a 250W HPS light. So, if I divide that by 1000 I get 0.250 kW for the formula.
Cost Electricity x Number of Hours x (Watts / 1000) = Total Cost
$0.37 kWh x 1,746 hours x 0.250 kW = $161


Do LED Grow Lights Use Less Electricity?
Short answer: Compared to HID grow lights, the short answer is YES, they do. However, the long answer is a little more complicated than that.

LED grow lights definitely have an advantage over HPS grow lights when it comes to electricity consumption. The running costs and durability of LED systems mean savings in other areas too, not just your electricity bill. Your heating bills will also go down and you won’t have to worry about replacing so may bulbs, either.

Best Marijuana Grow Lights for Sale

Optic 4 Gen4 Dimmable COB LED Grow Light



Optic LED grow lights are for those that want to push their plants to the absolute limit. Each Optic LED grow light system boasts commercial-grade COB (chips-on-board) optics and upgraded heatsinks for a cool-running system. What do enhanced COB LEDs and improved heatsinks mean? Incredibly bright light and an LED system that produces very little heat.

Furthermore, Optic LED grow lights are full-spectrum, meaning they contain 3,000K-5,000K. These figures translate into a cool white and an orange/red light. This allows cultivators to grow from seedling to final harvest - all with the same light.

Lumatek Attis 200W LED Grow light



The array of LEDs create a uniform spread of light at short distance from the crop enabling good penetration of canopy without hotspots and excessive heat. The innovative heat sink and use of passive natural convection has eliminated the need for a fan, reducing noise output and significantly increasing the life span of the fixture as it has no moving parts.

The Attis is a highly efficient grow light fixture with the 200W model producing 460 µmol/s PPF at 2.3 µmol/J efficacy (fixture efficiency) and ideal for a 0,8 x 0,8 m grow area. With the 300W model producing 690 µmol/s PPF at 2.3 µmol/J efficacy and ideal for a 1m² grow area.