SE FL999-6W Jumbo 2-IN-1 6W Black Light and LED Flashlight Jumbo 2-in-1 blacklight with LED flashlight Length: 10'' long; lanyard included 6 watt UV tube; white LED; UV wavelength: 365 nm; 2 way switch Requires 3D batteries (batteries not included); extremely lightweight Black light verifies security features on identification cards, passports and most currencies