The earliest LED flashlight only get a small amount of promotion in the military. However, with the progress of technology, white LED brightness has also been enhanced, the most important of which is the construction cost of the LED flashlight also decreases gradually LED flashlight towards the mass ranks of gradually. Brightness enhancement, This is mainly attributed to the emergence of the ITO, it is white LED brightness almost doubled.
With the advent of LED white LED the new flashlights also launched.
Initially, LED white light is low, resulting in the high cost of new LED flashlight products have been in the experimental stage, its expensive price ordinary people no one dare to ask Tianjin.
And in terms of price, due to the improvement of the production process, from the initial four dollars a down to 4 cents a cheap also a lot less than a dime.
Now the the popular flashlight on the market, 9 or 12 diameter of 5mm LEDs connected parallel, three battery-powered. Or a 1W or 3W or 5W high power LED.
The semiconductor lighting called fourth-generation lighting source, it can be said is a replacement product, the cost is much higher than the ordinary bulb flashlight, but a long life.
Aside Flashlight LED currently on the market of the product in terms of energy consumption between incandescent and fluorescent energy-saving aspects of ordinary bulbs I do not know how many, ranging from 1W-5W LED flashlight month, deals with energy-saving advantage if . But absolutely environmentally friendly, non-polluting. Long life, is the recognized advantages of the LED.