B-100AP models feature 100 watt longwave UV, Cool-Touch housing and ballast base. At 18 in. (457 mm), the lamp produces a highly intense center of UV irradiance about 5 in. (127 mm) in diameter. Lamp head can rotate 360 degrees when attached to the base for hands-free operation or lamp can be removed from the base. 8 ft primary and secondary cords.