When you say Xenon light, what exactly do you mean? Are you referring to HMI lights, used mostly for film making? All continuous light sources produce heat (IR radiation) and UV radiation. Xenon and other high pressure gas fixtures produce less heat than tungsten or halogen quartz fixtures. But they produce considerably more UV.
I've worked at a major US museum for over 30 years reproducing art work and I can tell you that most museums do not use continuous light sources for photographing art works. Most use electronic flash. However, in recent years high frequency fluorescent lights and LED lights have been used. If you are looking for a continuous light source for photographing art work, I would recommend either of these -- especially LED -- over Xenon. Both are much cooler and safer for the artwork. LED fixtures are expensive in the larger sizes, but produce almost no heat and little or no UV.
