Lighting Calc

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Thank you. Where/how do you get wattage info for a a given voltage/ circuit size?
The calculation is in post #18. You can input different voltages to get the total permitted watts at 80% of the branch circuit size. From there just divide the maximum watts by the wattage of each fixture.
 
Continuous load no more than 80% of the branch circuit rating. You started out by saying in the OP 120/208 volts so I can see the confusion because you later stated 277 volts. In my original example I used 120 volts. {20 amps*120 volts*80%=1800 watts} The value will change based on the circuit voltage.
Thanks sorry missed it.
 
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