Dolan-Jenner Fiber-Lite Mi-150 Series Fiber Optic Illuminators are designed with a 150W EKE bulb that has a typical lifetime of 1,000-10,000 hours depending on intensity. These illuminators have a low-profile top handle and side doors for easy lamp changes. Dolan-Jenner Fiber-Lite Mi-150 Series Fiber Optic Illuminators also feature an on/off rocker switch and an adjustment knob for intensity control. These illuminators are ideal for microscopy and spectroscopy applications. Dolan Jenner SX Fiber Optic adapters needed to mate with fiber optic light guides. Replacement Bulb sold separately.