if it is not on, more than that you wont really notice it.. but on another not about electrity, I just changed to the CFL (Compact flourescent lights) and my bill went from ~$60 to $33 a month! I never knew it would pay of that amount, I figured 2-3 dollars a month. But these things paid for themselves in 1/2 of a month. I changed 10 bulbs total!