Light source holder consists of 15W projector light mounted on square rod. The light source with optical glass lens, creates a bright and sharp spot of light. Specifications l White Color Light Beam l Power 15W Regulated DC power supply unit provides a continuously variable DC output voltage with excellent load and line regulation. The voltage output is displayed on analog / digital meter. An internal protection is provided by a slow blow fuse at the input and overload protection at the output.