Another thread about this. Maybe we can come up with something that someone might finish though. I have seen threads in here and googling around but it seems nobody has finished anything. I was searching and found a review at where it gave the spec of the LED. I had bought some LED's to play with, but their view angle was too narrow even though they had a 28,500mcd. Is there anything in specific to be looking for when trying to do lighting for Reef tanks? I know for a Fish Only tank with nothing else living, the lighting is just that, light. But in the tanks with other living oranisms like plants, corals and LR, they all have their needs. Can anybody help with the information needed to use LED's instead of the expensive Halides?