I am sorry for asking this since I am sure it has been previously answered but have not been able to find. How much light should I try to give my rics. I have a marineland dd 150 cube with 2 ecoray112 led lights. right now they are at the bottom of the tank near the front which is on the outer edge of the light. 27" below surface and lights 8 inches above water. I want to attach them to a bigger rock and move them up about half way in the tank but near the side so they will not be directly under the lights. They look pretty good now and I don't want to hurt them. Thanks for any help.