What makes night diving attractive for divers is that underwater life and living species are not fully exposed when you dive during the day time. As the light source of night dives is a diver’s flashlight, you can see the true colors of the undersea. It is possible to see the bioluminescence of the platonic organisms which are the beauty of night dives.
For us, diving equipment is our first thought when it comes to night diving. The dive flashlights used in diving are a little different from the ones we use on land. Although the working principle is the same, underwater lighthouses are covered with gaskets. Each cover contains seals of different sizes to prevent water leakage and it is necessary to regularly care for these seals with grease oil. If the water leaks the flashlight can not work properly.
A difference compared to the lanterns we use on land is that the dive lights are very strong. Therefore, a diver who uses a dive flashlight should not hold a flashlight towards his own face or someone else’s face. Doing so may cause discomfort in the eyes or even temporary loss of vision. In addition, diving flashlights should not be left open on land. Because after a period of time due to high power, the flashlight bulb becomes hot and may explode or the reflector melts your flashlight and becomes unusable.
Also dive flashlights which we use to see our surroundings at night dives has another area of use as well. In the daytime spearfishing , we look under the rocks or into the hollows using the flashlights that we call the “under stone flashlight”. The diving flashlights allow us to see the creatures in these dark areas. Under-stone flashlights are smaller and weaker than night-dive flashlights.
DAYTIME: Everything begins to look gray at 30 feet underwater, even during the day. Many divers prefer at least a compact secondary light that is easy to carry, but also powerful enough to illuminate the dazzling colors underwater.
NIGHTTIME: Night divers are advised to have both a primary and secondary dive light for safety. For maximum visibility in nighttime waters, select a light with a wide, bright beam that will penetrate the darkness. When it comes to underwater lights, the general rule is the brighter the better.
What kind of diving flashlight?
The dive light also called dive torch, scuba diving light, underwater light, canister light etc.
As soon as you start to buy your own diving equipment you will be able to dive more frequently and getting into different types of diving. At that moment, having certain dive accessories may come important. So if you are planning to experiment the following type of diving you must buy a diving flashlight.
– Night dive, cave diving and wreck diving : If you do not want to get lost during you night dive, prefer bright dive light with a wider beam angle.
– Technical and deep diving : try to chose a torch with a bright and tight beam with a long battery life span.
If you are not interested by the previous types of diving, and just want to go fun diving, know that having a diving flashlight on your wrist could be also quite usefull. More and more divers are bringing diving flashlights with them in order to examine more carefully holes and cracks finding fishs that they would have missed without it. For your fun dive, to look under rocks and insides holes better chose a small handheld narrow beam light that you can keep on your wrist while freediving.
You will face a vast choice when you will buy your first diving flashlight, from the small compact diving flashlight to huge lantern-type flashlights.
Sealing and resistance to pressure: There are a lot of waterproof diving flashlight in the market that are not at all made for freediving. Once underwater, the water will leak inside and your light will be usless. Make sure your diving flashlight is well designed to withstand hydrostatic pressure.
Durability and reliability : Prefer diving flashlight designed in solid materials such as steel, aluminum, stainless steel or even titanium.
It exists different models of bulbs (tungsten, halogen, Xenon, HID, LED). Xenon, tungsten and halogen bulbs are the least expensive but have two disadvantages.They are slightly less powerful and use the battery faster. For comparison, a 10 watt HID lamp illuminates as well as a 50 watt halogen lamp, while using only 20% of the energy required for halogen. LED lamps are the best at the moment and have the advantage of being the most durable.
Price : Diving equipments are most of the time expensive, and this is the same for diving flashlight. I will not recommend you to buy the cheapest diving flashlight. As with the rest of your freediving equipment, choose solid, quality ones that will last for years