I have 29g and 55g unplanted tanks. Bought the tanks at PetSmart and they have standard T8 bulbs. I want to get lights that will bring out the colors in my blue, gold and opaline gouramis and my B. rainbows. There are so many out there and of course they all "claim" to be terrific and the best. Does anyone have any idea which really are terrific and the best. I can't afford to change any of the fixtures so bulbs are all I can do.