hmm, it all depends. my emperor has been in there for about 3 weeks now and does an awsome job. the pj has been alive for about 4-5 weeks already. and neon i got this week. i bought a 28 watt Aqualight 20" compact fluorscent lamp, but the bulb was bad, so i returned it today, and am getting a new one on tuesday. my lighting should be good. im taking that and mixing it with my 15 watt 50/50. that gives me 4.3 watts per gallon which i think could be good. what do you think? thanks for the compliment nmreef. my gonis look good. but unfortunatly, they only live for short periods of time in captivity. even expert reefers cant keep them for a long time. but they look mad cool. plus the yellow one was a gift, and the white one was only 25 bucks. cant go wrong there. yellow has been in there for 3-4 days, and the white one has been in there for 2-3 weeks now and both are doing well.