LED Ring Lights for Microscopes or other applications available here through MilesCo Scientific. 

The LED ring light is the ideal choice for replacing a fluorescent ring light or fiber optic illuminator. The cost-effective design of the LED ring light quickly pays for itself with most LED ring lights lasting 10's of thousands of hours and with bright cool illumination throughout it's life. 

Most replacement bulbs for fluorescent and fiber optic models vary greatly in price, usually from around $10 to $200 and they usually only last 150 to 500 hours. Just think of how much you could spend on replacement bulbs over the life of those illuminators. The LED ring light is just as bright, if not BRIGHTER in some cases compared to halogen, fluorescent and tungsten illuminators. Also, there is no need to worry about your specimen drying up on you with an LED ring light. 

Hey, don't get me wrong, some researchers, lab technicians, professors, etc. just want to stick with their method of using fluorescent lighting or perhaps halogen or tungsten and they will spend a lot of money over time replacing bulbs, so I also have made these illuminators available to you as well.