The Donegan LT-42 VisorLIGHT is battery-powered and intended for use with the OptiVISOR (sold separately) for lighting a magnified viewing area. The 6,000 candle power Xenon bulb lamp swivels to direct light as desired and operates on two AA batteries (sold separately). The battery pack can clip to a belt, and the lamp with 42" cord clips to an OptiVISOR to provide four to five hours of continuous use.

Donegan Optical manufactures precision visual devices such as magnifiers and optical loupes. The company, founded in 1952, is headquartered in Lenexa, KS.