USE THIS HANDY GUIDE TO FIGURE OUT THE COST OF USING VARIOUS WATT FIXTURES.
POWER CONSUMPTION :
On average a light system will increase your electricity cost from $8 to $20 per month—the exact amount
depends on the size of the system and the number of hours operated. However, since these grow lights
are so energy efficient, you are getting huge amounts of light (and growing power) for your money! Make
sure your grow room’s power circuit can handle the power draw. For safety reasons, do not exceed 75%
of the rated ability of the fuse/breaker (for example: use no more than 15 amps on a 20-amp circuit). To
calculate your cost, multiply the bulb wattage X hours of operation and divide by 1000. This figure is the
number of kilo watt hours of electricity consumed. (Example: a 400 watt bulb running for 18 hours will
use 7.2 kilowatt hours). Check your power bill for the cost of each kilo watt hour. Then multiply the
number of kilowatt hours by the cost of a kilowatt hour (K/hr) to arrive at the cost per month to run the
light in your area.
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