this is something i built to hold a coralife 36" compact flourescent on a little bit of a tilt so that it would shine a little more towards the back of the aquarium rather then straight down. i did this because my m/h light fixture pushed my flourescents all the way to the front of the tank and they weren't lighting up the entire tank very well but they did on a slope. i designed it to fit my tank which is 36 1/2" long . so if you have a similar tank and you want it then it is yours. i just dont need it any more built a canopy instead