Sport Diver Magazine's 2011 Gear Buyer's Guide: UNDERWATER KINETICS Light Cannon eLED Dive Light

A pair of LEDs gets a brightness boost from a water-cooled heat sink in the front of the lens. The result is 500 lumens from eight C cells. A lockable switch allows for high (burn time 9.6 hours) or low (burn time 15 hours) settings.
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