LED is a new type of flashlight, since the advent of white LED, it has been introduced, but the initial time due to low brightness white LED, high cost, it can be said that such products have been in the "laboratory stage", the price of ordinary people no one Dare to ask, some military products have a small amount of promotion. With the increase in brightness of white LED, cost reduction, and gradually go out as the ranks of the public. The increase in brightness is mainly due to the emergence of ITO, the brightness almost doubled, and the price, due to the improvement of production technology, from the first four dollars down to the current 4 cents a cheap 1 cents below Many. Now the popular flashlight on the market with 9 or 12 diameter 5mm LED, the connection is parallel, 3 7 batteries. Or a 1W or 3W or 5W high power LED. 1W high power LED single device prices ranging from 15-35, the initial launch of lumileds 1W high power LED seems to sell 4-5 dollars.
Semiconductor lighting is known as the fourth generation of lighting, can be said to be a replacement product, cost much higher than ordinary light bulbs, but long life In terms of energy saving, ordinary light bulbs do not know how much, with LED flashlight about 1W-5W range, on the advantages of energy-saving, then put aside the flashlight, LED current market-oriented products in terms of energy consumption between incandescent and fluorescent lamps. But absolutely environmentally friendly, non-polluting. Long life, is recognized by the advantages of LED, but the market can be said that the flashlight with LED can be said to be good and bad.
LED flashlight another fatal shortcomings (ordinary people are not easy to find the shortcomings), color rendering low! In the LED display under the color of the incandescent lamp is not true, which from the spectral distribution of the analysis, are technical issues, without repeat. There is a drawback, the spot, due to the white LED manufacturing process defects with the reflective cup or lens with the error, likely to cause "yellow circle" problem. Some manufacturers do not consider the quality of the device and with the problem, completely copy the other manufacturers of products, the poor quality of the LED flashlight flooding the market, seriously damaged the reputation of LED.