Quote Originally Posted by smokealot123
...long story short he wants to grow 2 of these at a time and plans on getting over 20 grams per plant just for personal use.. his question is how much light is needed to grow just 2 AK 47 dwarf plants in a small space and how much will this drive the power bill up per month on average ?
One of the best discussions of how much light is needed for small, stealthy closet grows I've read is in this thread. See especially post #16, which details exactly how much bud came from different lighting levels. The bottom line is that 40 grams is very do-able with cheapo cfl's...he got 68.8 grams from 3 68w cfls, which locally to me cost about $15 each.

The bonus is that cfl's throw off considerable heat, and even in Canada that setup may provide enough that your friend* won't need additional heating.

Calculating the monthly electricity cost is easy. 3x68w is 204 watts. That means it's consumes a kilowatt every 5 hours. During veg where the lights are on 24/7, that's about 5 kilowatt-hours (kwh) per day, or 150 kwh per month. Multiply monthly kwh per your electric charge per kwh, and you have your bill. (At 15 cents per kwh, that would be about $22/month.)

During 12/12 flowering, the same lighting setup would consume about half that. 12x30x.204 = 73.4 kwh; or at 15 cents/kwh, about $11/month.

Adjust accordingly if your friend uses a different lighting schedule or if electricity costs more or less than 15 cents per kwh.

Hope that helps...

* = :thumbsup: