Thanks for the review!

Since the light is using only 60 Watts it depends on the duration the light is on. Commercially leafy greens usually get light for about 18 hours, that would be roughly 1000 Watts per day. At rate here in Austria that would cost you about €0,20 a day which adds up to €6 or about $7 USD a month (since the water pump is a little 5 Watts pump and it only on a short time from time to time we do not need to account for that in our calculations.

Short answer: about 7 bucks a month 😂