A flashlight is a device that has been around since the late 1890’s. It can be described as a portable, electrically-powered light source that is often held by hand. Back then, the most popular portable light emitting devices were gas lamps and candles. It was only when the dry cell batteries had been invented that the use of flashlights was made possible.
Flashlights once used incandescent light bulbs as their source of light. However, there have been a lot of issues with it; and these issues paved the way for the invention of LEDs or light-emitting diodes. The first high-powered LED was introduced by a company called Lumileds Corporation of San Jose, California. This was way back in 1999. The introduced product was called Luxeon LED.
Since then, LED flashlights have flooded the market with different varieties and formats. Some are powered by disposable batteries like the button cells, carbon-zinc, alkaline and lithium; while others can be recharged by using batteries made of lead acid, NiMH, NiCd and lithium ions.
Other than these two, LED’s can also be mechanically powered or it can use the help solar panels to generate the much needed electricity.
There are many reasons why LED lights are becoming more popular than incandescent light bulbs; in fact they are so in demand right now that there is a possibility that they might make incandescents obsolete in just a few years’ time.
Perhaps the most obvious reason will be the efficiency of LED’s as compared to the incandescent ones. The efficiency of cree LED lights can be attributed to the lumens that LED or light-emitting diodes produce per watt. If an incandescent light bulb has the capacity to produce about 8 to10 lumens per watt, then the corresponding LED can produce 100 lumens per watt.
Aside from this, an LED flashlight has a longer battery life as compared to the incandescent ones. Not to mention its minimal maintenance requirement.
In addition to these, LED lights are known to be sold in different formats. You can see some items which are shaped as pens, aptly called as penlights. You can also find another variety called a head lamp. Needless to say, head lamps are flashlights that are usually tied around the head. Head lamps are especially in demand for campers, hikers and miners.
For gun users, the flashlight of choice is the one that they call the tactical light. This type is often mounted to rifles or hand guns and is used to temporarily give an illumination towards their targeted prey.
In whatever format, size or shape, LED flashlight has always been in demand since the first day it became available. Its superior efficiency, brightness and durability have made it very popular with people both here and abroad.