I purchased an infrared light. It's a 100 W Philips infrared lightbulb. Says it's infrared, but I haven't done any spectrum analysis so I don't know for sure if it's just red or really infrared.
As I recall glass is specially opaque to infrared light. Doesn't the light bulb have to be of special glass? (I may be wrong in my assumption, though.)
Assuming a non absorbing material, I always think of longer wavelengths as having higher lattice penetration power as longer wavelengths collide with less particles as they travel. Although humans are not very lattice-like, I just want to know if what it says on the box is true or not. That it has more penetration power than a pure white light bulb, and it's really not just warm because of Joule effect (100 W is a lot, after all). Mostly, I think of low energy radiation as harmless to humans.Is infrared radiation so?