Scuba diving flashlights are used in a variety of shapes and sizes to supply divers with adequate light intensity, in order to ensure proper underwater visibility. Scuba diving flashlights are, therefore, meant to be bright, to offer increased visual range, and to last as long as possible, so that deep ocean divers will never have to deal with the inadequacies and dangers of lacking visibility while exploring the deeper reaches of the ocean.
Dive lights are essentially sources of light – usually operating based on electricity – so that divers can increase their visual range during deeper dives. Below a certain point, even the brightest sun rays cannot penetrate the thick layers of the ocean. This is precisely why dive lights are needed in most cases. Also, divers commonly use them when exploring underwater caves or taking color pictures. Since the water tends to absorb the longer wavelength light frequencies (such as red or yellow), special dive flashlights can be used to compensate and ensure that photographs can be taken in full color.
There are three main types of diving flashlights, two of which are highly essential for diving safety: primary dive lights and secondary dive lights. The primary ones are used as the main source of light that divers rely upon while descending into the darker depths of the ocean, while secondary lights are normally carried in order to provide a backup – in case the primary light fails. The quality and reliability factor associated with these dive lights and the need for a secondary light are essential for diving into caves and shipwrecks, where navigation is made even more difficult by the limited amount of available space. A third type of flashlight that is not essential for safety is the video light – designed to be usually small and manageable and to provide adequate viewing quality for underwater photographs and videos.
Choosing a proper scuba diving flashlight is not easy. While it obviously needs to be waterproof and to offer stable performance at high pressures, it also needs to be overall lightweight and manageable, while featuring a strong and dependable power supply, such as a high powered lithium-ion battery. The maximum depth of your new dive light is extremely essential, as it gives you the largest depth where the diving light can still operate, and allows you to choose only the lights that are suitable for your diving needs. The best scuba diving flashlight is one that offers a stable, homogenous and powerful luminous flux, while maintaining power consumption at a minimum.