LOVE LOVE LOVE the beautiful lighting these give in my tanks!!!! I've previously only used the plain white fluorescent bulbs. I really didn't think the 50/50 would make that big of a difference, boy was I wrong!!!! Very natural lighting!!! Brings out the beautiful colors of my angels and cichlids!!! I just wish that they would STOP increasing the price of bulbs!!!! Every time I find one I like and buy it, they up the price by at least a dollar!!!!