You know where your bird's favorite perching and playing areas are so if you they are close to the top of the cage, like my 'Too, and you only have a few inches of space above the cage, just move the light fixture over a little so that the distance from the light is increased a bit. Make sense?
my CAG is in a ground floor apartment that's huge but too dim and it really bothers me. I can't change the cage position.
Although these fixtures produce light, their main function is not lighting the room; it is providing a light frequency that will stimulate the conversion of vitamin D to D3, a form that is readily usable by the avian body. Too much of this light can stimulate the pineal gland to overproduce reproductive hormones; something you really DO NOT want to do. Dr. Doolen recommended eight hours a day of FSL.