GrowFAQ:

How much will it cost to run my light?

  Added by: Tick    Viewed: 835 times  Rated by 18 users: 4.43/10
Depending on where you live the average cost of running a 1K light 12/12 is about $20-$30 a month in electricity.
  Last modified: 18:48 - Jan 24, 2001 

faq:722 "How much will it cost to run my light?"