I'm looking at upgrading to T5s but don't understand the differences from what I have. I currently have Coralife PC lights - 2 65w 10k bulbs and 2 65w actinics. I was looking at the T5 2-54w retro kit and just realized I would be getting less wattage than what I have. I also do not see the 10k bulbs in the T5s. Do the T5s just simply function better and put out more light than the PCs regardless of the wattage? Any education here would be greatly appreciated.