Constructed of aircraft-grade aluminum with durable anodized finish and 3 white L.E.D.s. Long-life L.E.D. flashlight with solid-state circuitry allows batteries to last up to 20 times longer than standard 2 D flashlights. The white L.E.D. (light emitting diode) lasts up to 100,000 hours (over 11 years) of continuous use with change of batteries and unlike a bulb, never requires replacing.