The Professional Flashlight Experts. BrightGuy is committed to bringing you the best flashlights, headlamps, and scene lights from the top lighting manufacturers including Streamlight, Underwater Kinetics, Koehler Bright Star, Bayco NightStick, Princeton Tec, LedLenser, Fenix, Klarus, SureFire, Pelican, and Petzl, plus many more. BrightGuy also stocks replacement parts for the lights we sell. Replacement bulbs, batteries, lenses, o-rings - BrightGuy has what you need. Just find your light, parts will be listed with accessories for your light. If you can't find what you're looking for, please contact us.