A flashlight is commonly known as torch which is a hand-held electric light. The main source of a flashlight is either a LED (Light emitting diode) or an incandescent light bulb. There are mainly three parts in a flashlight- the light source, the material in which it is made and a battery. Other than this there is a switch and a transparent cover (to protect light source as well as reflect). The first flashlight, powered by a battery was invented in 1899 which was a great invention as one had instant access to a bright beam of light.
Today flashlights mostly run on rechargeable batteries or even have solar panels which recharge the battery with the help of sun rays. More about rechargeable flashlights at http://tacticalflashlightexpert.com/best-rechargeable-flashlights/. Shaking the lamp and turning the crank are also one of the methods which have been introduced.
Every moderate person needs a flashlight with better performance and utility rather than common plastic torch. To help the customers to buy flashlight according to their usage we have listed some of the flashlights with their benefits which will guide you to choose best out of all.
First option is the common utility flashlights, the one which we keep in our toolbox. It can either be of Incandescent bulbs or a Led flashlight, although the former one is least expensive but it wastes light energy by producing heat so battery doesn’t work for longer period. Whereas in led flashlight have a much longer life (as they do not produce heat) with little higher initial cost. Led torch are available in colorful as well as white lights which people find it to be more natural than other yellow lights.
Then there comes the heavy duty flashlights which are basically used in industries as they are made of heavy plastic and its composites. They are also susceptible to damage when roughly handled. They are made of better incandescent bulb or a krypton lamp which offer better light. The incandescent bulbs are filled with a gas usually krypton, xenon or halogen which makes the bulb more brighter and also helps in extending the life of the filament although it not as last longing as a LED bulb. 2 alkaline D-cell batteries are used to increase the average battery life. Switches usually have inter-locking design or a rubber encased push button.
Work flashlights are improved flashlights with better performance and durability which is designed for everyday utility. They are made of nylon or plastic composite that can withstand the daily abuse. They are even covered in a rubber adding comfort to the users. They are usually water resistant but not entirely waterproof. Battery life is average as it uses a xenon bulb unit which has a high light output that decreases the battery life. Switches are encased in a rubber.
Tactical flashlights, form of portable lighting that are designed for military and law enforcement purposes. Usually water resistant in nature and designed with aircraft grade aluminum or high grade composites. The lens is also made of scratch resistant Lexan. Switches are design in such a way that it can be easily use with a single hand. Bulbs have higher light output is made of HID, LED, xenon or Halogen. A High Intensity Discharge bulb (HID) passes electric current through a ball of ionized gas. They are bulky and often expensive so aren't as common as others but they produce very bright light Power for these tactical flashlights are provided through 2 alkaline D-cells, or rechargeable NiMH. Lithium Ion battery packs are also used which are most effective and long lived.
Head or helmet-mounted flashlights designed leave the hands free for miners and cyclists. Custom light flashlights are also available. Some of the flashlights even have a USB charging port which made it easier for people who loves travelling.
Having cleared all the desired requirements from the Flashlight in your head and considering all the aforementioned points before purchasing a Flashlight for yourself is surely going to help you make the right choice.
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