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 the brightness of white LED, cost reduction, and gradually take the ranks of the public. The increase in brightness is mainly due to the emergence of ITO, the brightness is almost doubled, and the price, due to the improvement of production technology, from the initial 4 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 Energy-saving, ordinary light bulbs do not know how much, with LED flashlight about 1W-5W range, talk about energy-saving advantages, 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 the recognized advantages of LED, but the market can be said that the flashlight with LED can be mixed.
LED flashlight another fatal shortcomings (ordinary people are not easy to find the shortcomings), low color rendering index! In the LED display under the color of the incandescent lamp is not true, which from the spectral distribution of the analysis, are technical problems, without repeat. There is also a drawback, the spot, due to the white LED manufacturing process defects coupled 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 other manufacturers products, the poor quality of the LED flashlight flooding the market, seriously damaged the reputation of LED.
When you use the torch brightness has become weak, you need to charge the battery. Do not wait until the battery runs out and recharge; do not overcharge the discharge, so as not to damage the battery life!
Charge overcharge, the need for positive and negative relative, do not reverse the battery positive and negative. LED flashlight charging charger indicator from the "red" to "green" is full, then, unplug the charger, stop charging, the battery charging time can not be too long, generally a 18650 battery to charge 3-6 bell.
LED flashlight to keep the wall clean, absolutely can not be wiped by hand or hard objects, remove the lens or glass on the fingerprint, you can use a cotton swab dipped in the lens cleaner gently wipe.
LED flashlight to avoid the sun or high temperature environment (placed at room temperature), flashlight after use, please remove the battery filled in a cool dry place. Do not expose the torch to long-term contact with sunlight, water, chemicals and turbid gases to avoid damage to the torch protection layer.