The MI-150 series illuminator has been re-designed to feature an optional iris and 5 times longer lamp life. 150W EKE bulb lifetime is typically 1000-10,000 hours depending on intensity. The MI-150 features a low-profile top handle and side door for easy lamp changes. Additional features include: on/off rocker switch, intensity control via adjustment knob, and 25mm filter holder with the standard IR filter. Dolan Jenner SX Fiber Optic adapters needed to mate with fiber optic light guides. Replacement Bulb sold separately.