Utilizes LG 365nm SMD LED source Rather than diode lamp, as high as 3000mW output power, 200mW/cm radiant energy which is a critical factor for some professional using for example UV glue curing. Equips with hard toughened black filter optical lens that eliminates most extraneous visible light (the visible light you see when you shine it on a surface is fluorescence). Latest plating technology aluminum alloy deep reflector cup make you get tight, strong and far light beam. Powered by 1 high capacity rechargeable battery, including an excellent quality charging base with overheat and overcharge protection. Extended runtime enable to continuously work for 6-8 hours. Reliability and Durability and Warranty: 1. 4.9 feet impact resistance, anti-scrape, anti-corrosive in harsh environment. 2. Digital regulated current output and constant brightness; Polarity reverse protection prevent the flashlight from improper battery insertion. 3. Apply with IPX-8 waterproof rate submersible 6.5 feet working for 30 min. 4. The factory and sellers guarantee 18 months quality warranty and 30 days return policy. Multitask application in profession: such as detecting counterfeit documents, money verification, forensic science, gasoline inspection, amber and jewelry detection, body fluid detection and fluorescence, attracting certain breeds of fish or hunting scorpions and tracking other creatures.