Undoubtedly, the new IMPACT XL is the finest 4 AA cell L.E.D. light to ever grace the market. Weighing in at approximately 5 ounces and offering waterproof integrity to 100 meters, the IMPACT XL utilizes a 1-watt L.E.D., which is one of the most powerful L.E.D. sources in the world. The light output of the IMPACT XL is significantly greater than competing 1-watt xenon and halogen bulbs and it produces a truer, whiter light than many other L.E.D. and incandescent flashlights on the market.