I bought two dental lights on craigslist. The light quality is pretty cool. It acts like a beauty dish (a still photography tool used in lighting for a hard/soft directional light). The light is evenly dispersed on the parabolic polished silver dish. Here's a photo of the light and an example from a small music video I did last week.
I might experiment by spray painting the dish white. The vignette is from the light which is cool. I might use the light to emulate a flashlight for a key light.