Douglas A. Tutty wrote: > Sure. We don't have florescents, nor even halogens. Plain ordinary > (soon to be discontinued) incandescant. Halogens are incandescents. They just use a bit of chemistry to run hotter than ordinary incandescents. Ron Johnson writes: > Visible light is 100,000GHz and infrared is 10,000GHz. Ultraviolet is > even higher. And everything at a temperature above absolute zero emits radiation at all wavelengths. -- John Hasler