what makes one led better to grow corals better then the next and can anyone send a link to some good ones ?
I don't like the fact some of the Amazon and Ebay fixtures don't have any violet LEDs. I think the 420nm violet is a must, especially if you are planning SPS. I'm not an LED (directional light) fan but I do use a ReefBreeders Photon over a small 29 gallon and it works quite well.