hey man, yea you got the math right

hey brother weedman, got a question on that eqauation you were helping me work out

...
the real way to figure this out would be ( wattage x hours per day x number of days) and then divide your yield by that would give you the EXACT figure for how many grams per watt ... and its gonna be something like 0.000004 grams per watt

a more proper way should be grams per KWH based on the following:
400w x 12 hours per day x 70 days flowering = 336,000 watts / 1000 = 336KWH . figuring a total yield of 12 ounces is .035 grams per KWH .... scary right ? but going by the way everyone does (not really reality) this is .84 grams per watt

ok so say your using 2000 watts, and harvested 2.5 lbs(dry weight) in 65 days.

so 2000w x 12 hours per day x 65 days flowering =1560 kwh used,now what.. 2.5 lbs is 1120 grams
how do I complete the equation.
divide 1120/1560???

giving me .7 grams per watts