Currently for my sorority tank I'm running a 17 watt t5 (or did I get a t8? I'll check when I get home) full spectrum daytime light for my now planted 20 gallon. Due to the nature of some of my plants, I want to upgrade my lighting so that I'm looking at more than one watt per gallon. How should I go about this? It seems that all the 24 inch lights which would fit my thirty inch tank are all 17 watts. I'm not precisely positive what to do about my lighting now. Suggestions?