When using stereoscopic dissecting microscopes, he prefers a focused light source that can be moved to put light where it is most effective. He has not been very happy with fluorescent units or with gooseneck lamps. But fiber optic units can cost as much as the microscope. He suggests saving money by purchasing an inexpensive highintensity lamp. However, they can get very hot.
More expensive units have heat-stopping lenses.
When purchasing a compound microscope a built-in or substage light source is a must. Fisher Scientific 2170 Martin Ave. These companies will more than likely have branches elsewhere in the U.S. which can be contacted.