Peiye Tactical Wear via Amazon offers the Golden Guy 1,200-Lumen CREE Scuba Flashlight Torch for $22.59. Coupon code "WWBM3PMW" cuts that to $16.94. With free shipping for Prime members, that's $6 off and the lowest price we could find. It uses one 18650 battery (not included) and is designed for underwater usage to 328 feet. Deal ends April 25.