guppie, I went to Walmart about a week ago and got one of those lights. If it is the same one you have then it has a kind of blue tint on the front of the bulb, right? I hope it works as good as yours. Also, what type of caulpera do you grow in your refugium? I tried the bubble, but didn't have much luck, from what I have heard its lif cycle is very short. The feather seems to be working the best for me. Do you have any pics?