When I had my Lumen Brite pendant set up, I suspended a black egg crate panel in front of it . It really helped to keep the light spillage down. Can also use white egg crate and paint it black with Krylon Fusion spray paint.

WarDog, he thinks it is the sun . My dogs love to lay in the sun :)

Hi Sebae,

Thanks for your advice. I was thinking what to use if the light is too much for my corals.