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. 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 Weight: 10 lbs Packing List: One 150W Variable Intensity Halogen Light Source One Power Cord Spare Fuses