I have (so far) successfully kept a bubble tip since Feb under 160 watts vho. It split in March and both have always done well. I feed them once or twice a week. I go to Wal Mart and for about 4 bucks buy a bag of frozen seafood (which lasts forever). It has shrimp, squid, octopus etc and I cut pieces very small and use a turkey baster to squirt a few pieces into the tentacles of the bubble tips, then they just wrap them up an push them to their mouth. IME feeding has been just as important if not more than high lighting . I feed the whole tank with these pieces of fish a couple times a week. HTH