Due to its rarity, krypton does not have many applications. Its main commercial use is in the illumination industry, where, together with argon, is used in fluorescent lamps, since it increases its shine and improves the tubes efficiency. Krypton is also used in flashes for high-speed pictures, because it allows an emission of a very intense light in a very reduced time (this gas, when excited, emits an intense flash that lasts only 1/50000 of a second). In smaller amounts, the element can also be used in incandescence lamps to increase the life of the tungsten filament. It can also be used in Medicine as absorber of X-ray or anesthetic.