LEDs offer these advantages over conventional incandescent bulbs: Incredibly energy efficient. Longer lasting. More compact. More durable. The LED Lenser advantage. Crystal Reflector Tube System - Led Lensers reflector tubes are lined with Italian crystal and precisely shaped to pump up the light produced by the LED for a broader, more powerful beam. Prism Reflector System: LED Lensers prism reflector solves the traditional problem with LEDS: intense up-close, but lacking beam depth and distance. Our patented system harnesses each LEDs power and drives it forward in a beam like traditional incandescent torches, but with all the advantages of LED technology. 24-carat gold contacts - gold is a superior electrical conductor, which minimises energy lost at the contact points and maximises energy that goes into light production. Solid metal casings - most competitors have plastic. High Wattage LEDs - LED Lenser uses only the highest wattage and the finest quality LEDs. We laboratory test our lights to determine precise milliwatt output. All products carry a lifetime guarantee.