Check the listing for details. 20W LED Light Source Wiht Fiber Optic Bundle Illuminator For Stereo-microscope. Condition: New – Open box. Listed at 270.00 USD. 20W LED Fiber Optic Illuminator Cold Light Source With a Flexible Light Guide S3000D model LED Fiber Optic Illuminator using the overall heat sink, high brightness LED and a unique condenser system to achieve high power output under the high brightness and long life; Compact appearance, side groove design easy to fix; Fiber Optic Illuminator S3000D whole unit with 20W power consumption, lower power consumption to save energy, providing Cold Light Illumination. AC / DC two power supply, constant current drive, knob dimming control. Product name LED Cold Light Source / Fiber Optic Illuminator Model S3000D Driving mode Continuous current regulation, Level 2 current protection, LED maximum voltage protection Input voltage Power Adapter (DC24V >1A) OR 24V DC power supply Total Consumption 1us, Very low latency response70 LED life > 30,000h Heat-dissipating method Heat sink + Silent fan Working temperature -20 ~ +40°C / 20%~80%RH Over temp protection 65°C（Restart drop temperature 40°C） Net weight 1.8 kg Dimension 168*70*102mm Packing List:One X LED Light Source BodyOne X Power cord (US style or as required)One X Power adapterOptional Parts and Accessories (sold separately):Fiber Optic Light Guide Optional: Single Flexible Light Guide, Dual Flexible Light Guide, Single Gooseneck Light GuideDual Gooseneck Light GuideRing Light Guide