"Armament Systems and Procedures, or ASP for short, is known for producing high quality equipment for law enforcement personnel. The ASP Spectrum UV is no exception to this rule but is packed with a ton of features that make it an excellent choice for outdoor adventures and emergency situations. The feature rich The Spectrum UV offers momentary or fixed on/off switches, multiple brightness options, strobe, and 4 different color lighting modes including standard white, red, blue, and UV. While white is most used the other lighting modes should not be underestimated."