Coast LED-Lenser L.E.D. Flashlight Advantages are 1) Reflector Systems. Coast LED-Lenser LED flashlights feature advanced technology that pumps up the light produced by the LED. The result is a broader, deeper and more powerful beam of light. 2) More energy efficient. Coast LED-Lenser LED flashlights use patented technology that enables them to create more useful light with fewer LED's than comparable LED flashlights 3) 24 Karat gold contacts. Coast LED-Lenser LED flashlights use gold as it is a superior energy conductor, it minimizes the energy lost at the contact points and maximizes the energy for light production. 4) Solid Metal Housings. Most Coast LED-Lenser LED flashlights are encased in solid brass with a nickel-alloy coating and rated 54 on the Rockwell Hardness Scale. Other Coast LED-Lenser LED flashlights use the finest Aircraft Grade Aluminum, are hard anodized and guaranteed for life. 5) Patented, higher quality, higher wattage LEDs. Coast LED-Lenser LED flashlights use only the very best Nichia and Luxeon LED's.