Dive lights are, of course, essential for seeing while night diving. They’re also your principle means of communication at night. In the daytime they come in handy for lighting places where the sun doesn’t reach — overhangs, crevices, swim-throughs — and for those trained in overhead environments, wrecks, caverns and caves. Different types of lights, from LED to fluorescent lights, can change the diving experience. They come in many shapes, sizes and purposes — large and small, wide beam and narrow beam, electric and chemical. Lights can be powered by one-charge batteries, rechargeable batteries or even sea water. Some lights have handles or pistol grips, some fit in the palm of your hand and others strap to your head. And they’re useful above water as well as below. Some dive lights are also intended to act as a safety device.

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