<a href=showthread.php?s=&postid=7559790#post7559790 target=_blank>Originally posted</a> by Horace
There is a need if you want to run dusk/dawn. Not many people like to run thier halides for 12 hrs a day either. I enjoy having my tank lit for atleast 12 hours a day. I dont think it would be wise to run halides for 12hrs/day. Not only would it likely be too much light, it would raise your power bill ALOT.