This is a 20 watt halogen illuminator for microscopes. It comes with a 115V solid-state light source with full intensity-adjustable and a 23 (585mm) metal-sheathed gooseneck cable. This high intensity lighting system is excellent for semiconductor electronic and biological applications. Features & Specifications: Bright and even halogen illuminator with variable-intensity. Flexible and very convenient for any workspace. 23 flexible goose neck cable. 120 volt light source. 12 volt 20 watt halogen bulb. Manufactured under ISO 9001 Quality Control System. Excellent OneYear Manufacturer Warranty. Lowest Price for the Same Guaranteed or the Difference Back! Satisfaction Guaranteed or Your Money Back! Shipping Weight: 7 lbs.