Tonelife TL3218 1000lumens Dive Light Scuba Diving Torch Led Flashlight with Waterproof 492ft Cree Xml2 U2 Rotary Switch Use C Dry or 18650/26650 Li-ion Batteries (Torch+Lanyard+Tube) Deep Performer! A Tonelife Long Neck TL3218 Dive Light was taken on dives to 50, 110 and 154 metres in September 2013 by Chris Davidson and Fred Headley while in Thailand with great success. Maybe you won't be going that deep, but wouldn't it be nice having a primary/backup dive torch that can. Power Source: Use 3*C Dry batteries or 2*18650/26650 Li-ion battery (Battery Not Included) Massive Performance, Great Value - The single CREE XM-L U4 LED (New Version!!!) bulb delivers a massive 1050 lumens of bright white 6000-7000K light and 3 to 6 hours of burn time depending on the batteries used. This is more than bright enough to provide light for any underwater requirement, especially as a backup dive torch. The Tonelife TL3218 dive torch is an awesome, bright, hand held, beautifully designed, non-canister LED dive light and represents excellent value. The body design includes an excellent centre hard tie point at the base to attach a bolt snap (e.g. a Small or Medium stainless steel bolt snap with swivel-eye,NOT include) so you can clip it off to a D-ring for easy mounting onto your BCD, or the shoulder straps of your BP/W. You might decide to use a retractor with it. Or you can use the included Wrist Lanyard, or with Soft Goodman handle, or easily stow it in a pocket. Whatever option you choose the light stays with you. Simple Operate,The more simple the more safe,Tonelife TL3218 use rotary switch and one mode(ON/OFF),you can easy turn on the lights when underwater,Chris have test many kinds of Diving lights and find the rotary switch are most suitable for underwater use,sometimes lamplight means life,we don't need a torch are easy not work when underwater use,Tonelife TL3208 keep provide excellent performance and help you a excellent diving experiene!!