This microscope illuminator light source control box offers 150 Watt halogen lighting, providing strong, even and cool daylight illumination. The light source comes with a built-in heat filter for cool light, a specially designed slot for color filters, and solid state controls for full adjustment of intensity. Its top window design is convenient for changing bulbs. Its auto-shut-off mechanism will cut off electricity automatically when the window is open. The light source comes with a two-step mounting adapter with 5/8" (16mm) and 25/32" (20mm) inside diameters for attaching fiber optic light cable, either gooseneck or ring. This cool high intensity lighting system is excellent for biological and electronic applications. This unit is brand new in original box. Its retail value is above $900. Features & Specifications: 150 Watt Halogen Light Source Control Box with Variable Intensity Built-in Heat Filter Slot for Inserting Color Filters (available as optional items) Convenient Top Window Design for Changing Bulbs Auto-Shut-Off Mechanism for Electrical Safety Great for Discriminating Lighting High Intensity 24V/150W Quartz Halogen Bulb Forced Air Cooling System 3200 Degrees Kelvin Lamp Color Temperature Durable Metal Construction Manufactured under ISO 9001 Standards Excellent One Year Manufacturer Warranty Unbeatable low price Guaranteed or the Difference Back! Satisfaction Guaranteed or Your Money Back! Weight: 10 lbs Packing List: One 150W Variable Intensity Halogen Light Source One Power Cord Two Spare Fuses