Well I am using 2 Current 10,000k t-5 bulbs white bulbs now. Before I was only using actinics for 8 hours a day and MH for 4 hours a day. Too much lighting in my tank, didnt like what i saw and needed to decrease the lighting and now i have it at 7 hours a day of t-5's and 2 hours of MH. I like a lot better now. Thank you for the comment.