OPTICAL FIBER LIGHT Fiber optic microscope illuminator provides strong, even and cool daylight illumination. It comes with 50 Watt or 150Watt Halogen light source and dual gooseneck lights. The inside fan design also allows the unit to work with very low noise. This cool high intensity lighting system is excellent for Gemological, Biological and Electronic applications. The light intensity can be varied according to requirement with a knob.