Quote Originally Posted by DreadedHermie
One more thang: multiply that by the number of hours the lights are on each day, probably around 12 (der). And your ballasts may add few hundred watts as well.

Prolly gonna be like 2.3kW x 12hr x 30 (days) x cost per kW hour. But your guess is good. :rasta:
good looking out DH!

-shake