I'm working on decorating my dorm room, and I want to put some paper in my fluorescent light fixture. It's a regular 4' 2 bulb fixture with a light diffuser around it. Any reason I can't put some papers on the light diffuser? I've had the light on for several hours today, I turned it off and touched the bulbs, and they're hardly warm. So I doubt there would be any problem with what I want to do, but I figured I'd check. Thanks!