The Aven Tools 26200B-202 ring light is ideal for microscopic and macroscopic inspection, quality control, photographic applications, assembly and biological analysis. Your inspection subject is illuminated with 360 degrees of shadow-free diffused illumination. The reflector housing is cast from high quality A1.alloy for durable and cool operation. The housing is treated with a baked on enamel which provides long-term durability and seals it against particulate contamination making it useful in clean rooms. The lamp color temperature is 6000°K simulating natural white daylight. Special electronic circuitry makes this ring light ideal for frame grabbers and machine vision systems. It comes with rubber tipped thumbscrews that provide simple and versatile mounting eliminating the need for adapters in most situations. Easily clamps on to lenses from sizes 1.25"(31.75mm) to 2.15"(54.61mm), and up to 2.6"(66.04 mm)with the set screws.