I guess I'm in the minority, But I considered the cost of the original light, plus the cost of bulb replacement, plus monthly electric cost, plus the fact that my friend almost burned his house down. I added all that up and decided to see what corals would do well under my lights and I found that there is NOTHING that I want, that I can't keep. My nems, clam, montis, you name it- they all grow like weeds. My green monti was an invisable hitchhiker on my kenya trees and now I've got more than I know what to do with.