The 50/50 bulbs are oddly labeled, they should be labeled as 10,000K but this is what coralvue is calling them... they are really ATI 10,000K bulbs. I have seen a few of them and have a couple on my tank right now, they are definately 10,000K's and not '50/50'. I have 2 actinics and two 10,000Ks on my system now and I must say I really like the look.
