http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=live-rock#1 I want to have live rock in my aquarium and I wanted to ask if there is any specific light requirement. MARLY original post: February 23, 2007, 3:38 pm anonymous 2008-05-01 http://forum.aqua-fish.net/?topic=live-rock#2 Hi Marly, The minimum that you will need is 3 watts per gallon. jan 2008-05-01 http://forum.aqua-fish.net/?topic=live-rock#3 its not the Live rock that needs the light so much as the future corals that you intend to add.Are you going for soft or hard corals . Whats the size of your tank and I will be able to answer better,especially need to know the depth. mickey 2008-05-01