<a href=showthread.php?s=&postid=7682944#post7682944 target=_blank>Originally posted</a> by RichConley
Check your pumps. Theyre usually the issue, not the lights.
1 100w pump puts a lot more heat in your water (that needs to be chilled) and uses almost as much electricity as a 400w halide.(24h vs 7 h running)