Hi guys, I was wondering if this is enough light for my 20gals system. I have a 130watts pc system and took out the white bulb leaving me with only the blue one which is only 65watts because I believed that with the white blub, my lighting is too intense for some of my corals, beside, I like the coloration with the blue one more. In my tank, I have 1 zoo, 1 flowerployp, 1 clam, and a 7 heads torch coral(pom-pom coral). I don't know if 65watts is enough for the clam.