Be Fully Equipped with an Underwater Flashlight

An underwater hunter can be perfectly equipped, with a comfortable diving suit, a safe breathing apparatus, diving equipment, and a fail-proof weapon. However, the lack of one, as it may seem, a small detail of equipment – the underwater flashlight – may undermine all efforts.

How to Select the best Underwater Flashlight for your needs

These impose a number of requirements:

  1. First of all, obviously, it has to be water-resistant. It is necessary to regularly check all the sealing elements for damage.
  2. The choice of an underwater flashlight is connected with the structural integrity, which will undergo loading under conditions of the increased pressure. The body of powerful models are usually made from metal (aluminum or even titanium), whereas the body of the simpler ones are made from impact-resistant plastic.
  3. One of the main requirements is that the flashlight needs to be ergonomic, and convenient for a diver underwater. It should not be too big, hamper, and have an easy access to control elements.
  4. The construction can range from the well-known hand-held cylinder to a large-format box with a handle. Apart from mono-blocks, there are divided constructions – a bag with batteries on the belt and the flashlight itself is in the hands. Flashlights fastened on spear gun are popular with underwater hunters. There are those who prefer to place the device on their mask.
  5. The flashlight must have sufficient light output.
  6. The power cell capacity and the types of flashlight bulbs must cumulatively provide a long-term service life without the need to charge or replace the batteries. It also depends on the power supply characteristics as well as on the types of light-emitting elements (bulbs or LEDs).
  7. It must have a convenient switch for continuous operation underwater as well as for a tactic, pulse action.

    The Reed magnetic switches are applied in the powerful apparatuses, where a significant current magnitude is used. A good underwater flashlight is provided with a safety lock – it will prevent the device from spontaneously turning on, for example, inside a bag.

  8. Finally, it must have the capacity to be fastened to the diver’s equipment, be provided with a safety strap, so that it will be firmly held in the hand underwater.


The speculation over which device is better – the flashlight with accumulators or the one with batteries – tips the scales in the favor of the models with accumulators. That is not surprising, as the modern rechargeable power cells possess a superior power and the capacity allowing the underwater flashlight to function in extreme conditions for a long time.

However, they have a significant disadvantage – an inexperienced user can wreck them quickly. The thing is that the accumulator flashlights possess a peculiar “memory”, and if a not fully charged power cell is charged, its energy capacity will be drastically reduced. A few such cycles – and its service life will be very short. Therefore, they need to be fully discharged first.

The lithium accumulators are deprived of these disadvantages – they are state-of-the-art and the most powerful. Their only flaw is a high price.

Some flashlights can be directly connected to the power adapter, whereas the others need the accumulator removal in order to have them charged.

There is another important nuance, which sometimes hinders people wishing to purchase an accumulator flashlight. During a long-term hiking, the power supply for charging is not always available. At times like this problem can be resolved with an adapter connection to the vehicle power supply via the cigarette lighter charger.


In terms of light emission, underwater flashlights can be divided into halogen, LED or xenon. The halogen bulbs are rarely used now because of their high energy consumption and short service life.

Moreover, they can be difficult to maintain; their work involves very high heat emission. Thus, a halogen underwater flashlight turned on in the air, can overheat, which will result in its breakdown.

In the majority of cases, flashlights for underwater use of small and medium power contain LEDs grouped in clusters and installed into structured reflectors. The light output of these semiconductor light sources can even surpass the one given by usual incandescent bulbs; at the same time, their energy consumption is several times less.


If a very powerful light source, of 50-100 Watts and higher, is needed, the xenon bulbs are used. They provide a strong and a non-diffused light beam, which allows underwater hunting even in the turbid water or at night.

Furthermore, the xenon bulbs are characterized by relatively low energy consumption, but their service life is significantly inferior to the LED one. The xenon underwater flashlights are pretty expensive and this is the main drawback. They are a piece of equipment for an experienced well-trained underwater hunter, ready for diving in all conditions.