Detailed Description  Product feature:  A 56 bright white LED bulb ring light kit for microscopes. The kit includes a 54 / 56-leds ring light with 2-3 / 8" (60mm) inner diameter, a 110-240v power adapter. With variable intensity control, it provides cool, even, intense and focused shadow-free illumination. It is an ideal durable cool light source for microscopes. Its retail cost is around $400 in US and around $300 in China.  Product specifications 1, 56 bright white LED bulbs.  2, 20, 000 hours of life.  3, cool, even, intense and focused shadow-free illumination.  4, variable intensity control.  5, optimum light range: 2-3 / 8"-5-1 / 2" (60 to 140mm) .  6, power input: 110-240v, 50-60hz, auto switching.  7, fits 35-59mm mount rings.  8, ESD free We could offer other LED ring lights with different amount of LED bulbs (36leds, 48leds, 54leds, 60leds 72leds and 80leds) and all LED ring lights could be customized.