Im upset my baby black and white clown jumped today,the other clown pro scared him..How much of light loss will I get if i put a egg crate over the tank to cover? I dont want to disturb the coral as they are growing great with the light now.I gotta get this tank covered before I add more fish.. what else can be used to cover tank without light loss.. I have 2 150mh with 4t5s,14inches above the tank on a 40 breeder. Thanks