Portable shortware lamp used to check phosphorescence on rocks and minerals. Nylon strap is attached for easy carrying. Operates on 4 "AA" batteries (included). Supplied with 4 watt ultraviolet lamp. The wavelength is 254 nm (nanometers). No filter is included with this lamp.
Size: 6-1/2" x 2-1/2" x 7/8" high