For sale is a Optispec Variable Intensity Laboratory Light Source, Manufacturer's product No.MP35030. Labeled: Part No.20500 / 08, Serial No.162634. 150 Watts maximum output. Uses Type 20/21V, 150 Watt bulb. Variable illumination potentiometer. 1/60/115-120V Single phase AC input. Receptacle at rear of unit accepts a standard 3-hole IEC power cord. NOTE: I have tested this unit in my shop, and found it to be in excellent working condition.