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Originally Posted by ***********
The formula for converting watts to amps......
WATTS divided by VOLTS = AMPS
Two 400 watt HPS lamps = 800 watts.
Standard home current in the USA = 120 volts
So 800watts divided by 120volts = 6.66amps
Play it SAFE! Do Not overload your breakers!
Most home circuit breakers are 15 or 20 amps
Don't come close to loads either....why risk plunging your plants into darkness by overloading circuits? Untimely darkness might cause morphing turning females into males.
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was that there before I posted? I don't remember seeing it. I noticed you edited the post. Sorry if it was and I just repeated what ya said.
A good rule of thumb is to only load a circuit 80% of what it can handle. So, basically a 15 amp circuit can handle 1440 watts without a problem.