Quoted from schudel5:The ones with the fluorescent tube? I use just standard 8-1/2" x 11" white copy paper and wrap the lamp. Two sheets in landscape orientation end-to-end will cover the entire lamp.
This works great, I wrap them kind of loosely. You can also buy plastic tubes made for dimming fluorescent tubes. That's fine, but paper works good too.
And no, you won't burn up your game by wrapping some paper around the tube.