Bead- It was heard 1 W lights bead in Guzhen town are sold on the market now 2-6 cents, why can sell two cents, it's not gold wire but with copper wire, consumers can't get to feel that, other raw materials substitute rubbish things you don't know, but he says it is 1 W, actually measured with professional equipment is not 1 W, can as long as 0.5 W, even lower,the consumer is hard to test.

Shell- Waste aluminum or plastic, cost $0.2 to $0.5

Power supplier- Driver in the market now are sold to less than $0.2/piece, and even lower, here I want to strongly condemn those who do garbage drive businesses, in order to profit irresponsible.

Last time, the news exploded a consumer to buy the cheap LED lights, LED lights blown apart, here I advise those who bought those cheap LED lamps and lanterns, for your family's safety take the lamp off right now, you buy one or several bombs containing at home, so that seems a 3 w LED ceiling lamp is three beads + a shell+ a driver is OK, we'll work it out the cost of the intermediate goods: lamp bead (0.3USD) + shell (0.5USD) + driver (0.5USD) + artificial (0.1 yuan) + packaging ($0.1) + other (0.2) = USD 1.7, such a low price is that possible?

Businessmen make money, need add cost on inventory, management,development and so on. if no profit nobody do business! And 5% extract by ebay or other plate provider, a 1.7 USD LED - 3 w spotlight, are you dare to use?

I told you a high-grade LED spotlight 3 w reasonable price: lamp bead ($1) + shell ($0.9) + inner shell ($0.4) + driver ($0.9) + artificial ($0.2) + packing ($0.2) + others($0.2) = $3.8,> $3.8 to spotlight is normal and reasonable price.

Ok, now I will tell you how to choose a good LED lights.

About the LED lighting, should pay attention to the following places:

1, LED brightness is different, the price is different. Used for LED lamps and lanterns, the LED should be suitable for laser level Ⅰ class standard.

2, Antistatic ability of LED, long life, so price is high. Antistatic usually greater than 700 v LED can be used in the LED lighting.

3, LED wavelength consistent, color is consistent, if request the same color, the price is high. if the manufacturer have not LED light color separation instrument is not easy to produce color purity product.

4, LED leakage current is a one-way conductive lights, if there is a reverse current, it is called leakage, leakage current bigger, shorter life, lower price.

5, LED light Angle is different. Specific light Angle the price is higher.

6, The key to Quality is life, life is decided by droop. Droop small, long life, the price is high.

7, LED lights for chip, different chip, price difference is very big. Chip from Japan, the United States is more expensive,Taiwan chip prices lower than Japan, the United States.

8, Chip size depend on side length, said big LED chip quality is better than the small chips. The price is proportional with the chip size.

9, LED colloid generally is epoxy resin, leds with uv radiation and fire retardant more expensive, high quality outdoor LED lighting should be uv and fire prevention. Each product can have different design, different design suitable for different purposes, the reliability of the LED lighting design line, electrical safety, fire safety, environmental safety, mechanical safety, health and safety, security, application time and other factors. From the perspective of the electrical safety shall be suitable for coherent international, country standards.

Because of the LED is a new product, the country standard lag, but the country to provide product qualification testing. With international safety certification (such as GS, CE, UL, etc.) product quality certification and country LED lighting price is higher, because these products on the safety design is reliable. The attention of consumers is carefully identification certificate of authenticity, today's international safety certification and country product certificate of manufacturer is not many.

From the aspects of health, the use of non-toxic materials design products price is higher, especially the indoor LED lighting, don't keen on gaining petty advantages to choose LED lighting is faulty. Now only a few several LED manufacturer is made from non-toxic materials, identify method can directly use the nose, smelly products price more lower than without bad smell. Similar toxins such as lead, mercury, cadmium needs professional analysis. Look from the applicable environmental security, have reliable dustproof moistureproof design, data of fire prevention, prevent ultraviolet ray, prevent cold cracking of LED products price is high.