Definition - What does Xenon mean?
Xenon is a chemical element with the symbol Xe and atomic number 54. In its natural state, xenon is a dense, colorless, odorless gas typically found in the Earth’s atmosphere in trace amounts. Xenon also belongs to a category of gaseous elements known as noble gases (along with helium, neon, argon and krypton) and is well known for its inertness and stability. Xenon is sometimes used in lamps that are used for accelerated weathering tests.
Corrosionpedia explains Xenon
Xenon is widely used as a gaseous medium in arc lamps, which work by passing an electric current through ionized xenon at high pressure to produce a bright white light. This light reproduces the entire spectrum of sunlight, including ultraviolet (UV), visible light and infrared (IR).
For this reason, xenon arc testing chambers are frequently used during accelerated weathering tests in accordance with ASTM G 155. These lamps effectively mimic sunlight to provide an accurate simulation of environmental weathering on coatings, plastics, inks and other organic materials.