These UV Lamps are designed to provide a beam of 365 nm wave with an average 7000uW/cm2 at 15" (38.2 cm). Its powerful 100-watt light source fluoresces fine particles and hard to see surface defects. The lifetime of the light bulb is 2,000 hours. At 18" (45.7 cm), this lamp produces a highly intense center of UV irradiance about 5" (12.5 cm) in diameter. This offers the microscopist a quality tool in staining and polymerization as well as many other uses that are related to UV lights in EM labs. The lamp head rotates a full 3600, and is mounted into a removable pistol grip handle, which inserts firmly into the transformer base (as a stand); it weighs only 2½ lbs. It comes with a 5" (12.5 cm) diameter black light filter which is recessed in the head. If more details are needed in order to study the subject, a second filter is available as an option that reduces the visible light. Powered by 115V, 60Hz, total cord length is 15 ft. (4.57 m).