I just replaced my pc's with a t5 retro kit from reefgeeks. I didn't have name brand PC's to begin with and was never happy with the color or my coral growth. The retro kit had all the top brands pieces, ice cap reflector, vossloh ballast, UVL actinic bulbs... Truly amazing in the difference. It's only been running a few days now, but I've already seen a significant increase of coral growth on my birdsnest coral!
I definitely recommend the t5's!