Intensilight Hg Pre-Centered Fiber Illuminator is a pre-centered fiber optic lighting system with a long-life bulb that is easy to replace and does not require alignment. Intensilght provides flicker-free, stable light intensity and can be controlled using Nikon's NIS-Elements software. The typical lamp life is 2000 hours, which is 10 times longer than traditional mercury lamps. In addition, the fiber optic connection of Intensilight means that the lamp does not generate heat or electrical noise.