Roughly 10 bucks a month in electricity 182 watts is 18.2% of a kilowatt hour multiply that by 18 hours a day times 30 days times 11 cents of electricity the cabinet has about 140 bucks in it. When I do the big grow room usage will jump to 300 watts but I won't use as much heating the house because I will be venting hot air into my bedroom.

The ability for me to grow exotic peppers and have good tomatoes when everyone else is eating red cardboard is worth it