Yeah, took me awhile tog et the t5 lighting down, I;m working on understanding MH
's now. lol
I personally like a blue tank so on my 55g I got new ati bulbs. 2 aquablue specials and 2 blue plus'es.
I paln on going with almost the same setup when/ifg I do finally get new bulbs for the 125g. I'm just gonna add a purple plus instead of 2 of the blue pluses.
Most people opt for a micx of 12k bulbs and then either mixing the purples and the actinics. All depends on what look you are looking for. I find 10k bulbs to be too yellow and it seems to wash out the colors of the corals.