Features : 150 Watt Halogen Variable Intensity Fiber Optic Light Source 110 VAC input, 400W total. Convenient Top Window Design for Changing Bulbs. Auto-Shut-Off Mechanism for Electrical Safty. Great for Discriminating Lighting. Perfect for Evenly Illuminating a Specimen without Heating. High-Intensity 21V/150W Quartz Halogen Bulb. Forced Air Cooling System. 3200 Degrees Kelvin Lamp Color Temperature. Durable Metal Construction . Also, can be used in dicing saw and wire saw for better lighting