LED industry has not yet been expected to mature

LED as a new type of light source, energy saving, long life, no pollution and widespread concern. Especially Chinese Olympic Games successfully used a large number of LED technology, the effect is remarkable, the local governments have to support the LED industry, built a demonstration unit, a large number of LED at the same time, a large number of enterprises are also involved in the field, even the car battery started, famous BYD company put forward the slogan of the world's first LED again. Did LED really enter the boom period?

There is no lighting equipment such as LED has not yet been expected to mature, but the slow development, but also make the LED product is too conceptual, lack of customer base. Even now the government is trying to support the growth of the LED street lamp as a breakthrough, but LED is still not formed for both civil and commercial customer base, LED. There is a danger signal at this time: LED manufacturers have to reduce costs as the first priority! Many companies will expand the current LED to maintain unchanged in the case of reducing the number of wick brightness in order to save costs, or PCB compression area, or reduce the safety devices and other methods, of course, we have to believe that the congenital advantage of China the company in the cost of compression. Don't say the effects of product safety, industry group, LED entered the price reshuffle situation in the market is not the case, which is detrimental to the entire industry, the bulk of the funds into the decline will aggravate the small and medium sized enterprises.

This is a dangerous situation, technology development on the one hand, LED will stagnate or even degradation, on the other hand, the cost of compression, or that much attention costs to ensure that the final product quality, will a great extent cannot show the advantage of LED. So I think this is bold, LED industry development in the wrong direction.

Now the LED industry in order to open the civilian market, mostly LED lamps designed to be replaced, that is, the direct replacement of existing lamps. But in the process of development of lamps, in addition to the compact tube directly replace incandescent lamps, few direct replacement models, such as T8, ceiling lamps is almost a fluorescent lamp and chandelier is still patent, tungsten lamp of the world, why LED must go replace the road?

What are the disadvantages of the existing replacement lamps:

1 heat

LED heat is poor is evident to anyone, will bring the problem of the service life of the wick. The existing design of the LED lamp is often difficult to meet the requirements of heat dissipation, in a very demanding field of heat dissipation, but the use of very poor passive heat dissipation, and mostly air-cooled, and even closed air cooling. Like some lamps between the drive plate and the aluminum radiator to add plastic casing to increase the reliability of the insulation, but also need to heat the silica gel to improve heat dissipation. The T8 lamp tube is closed, wick can only rely on air convection heat transfer to the back of the tube on the aluminum tube for heat dissipation. In general, the internal temperature of the lamp will be seventy or eighty degrees. And if you take into account the heat, weight is a problem; take into account the weight, heat is difficult to ensure that this is a dilemma in the existing design options, there is no feasible standard.

2 life

With the increase of temperature, the temperature of the wick decreases exponentially, and the lifetime of the electrolytic capacitor is reduced by half, and the temperature of the MOS increases, the internal resistance increases, the loss increases, and the temperature increases (constant current mode), and finally, the temperature of the LED wick decreases. Of course, the domestic manufacturers did not give a specific LED lamp life, publicity time just mentioned LED wick life one hundred thousand hours, but the life bottleneck of LED driver board in the system, often LED wick is not damaged, driving system is destroyed.

In addition LED attenuation is very serious, so the life of lamps should be considered in visual perception, after long time is reduced to the lamp brightness visual feel dark, can think of life, the customer will consider replacing the lamp, the life of manufacturers are not give out (or not given), but this is very important.

In other words, most of the existing LED home lighting by volume constraints, the protection is difficult to do well, in the voltage fluctuations, the area of serious interference, the existing low power design is a test.

Most importantly, the life of LED and the company's life span is proportional to the LED lamp if publicity for 10 years 2 years on the bad, and half a year ago the company has put up the shutters, whether the user will take the risk?

3 weight

The lamp screw interface, one of several fluorescent lamps weighs only LED lamps, due to the absence of the heat sink, the weight of the lamp holder for fluorescent lamp is negligible, but the weight of LED is a serious challenge to the holder, especially the 7.8W helix interface LED lamp, its weight it is dangerous, this point and what businesses consider?

4 price

General LED drive board at 70 degrees of temperature may be life expectancy of only 5 years (home), far less than the LED wick to achieve the concept of "10 years"". Therefore, compared to the same brightness of the fluorescent lamp, even if the fluorescent lamp is only 1 years of life, 1W1 yuan fluorescent lamp is much more cost-effective than 1W10 yuan LED. In particular, the LED lamp is often damaged wick is not bad, but the whole lamp replacement. Count because the drive plate 1/10 is to discard the remaining 9/10 lights (the wick and the heat sink accounted for most of the cost of the whole lamp), if every manufacturer did not do a good job of recycling, the customer is not love this product.

5 efficiency

Some people may be very strange, LED is energy-saving products, why should consider the efficiency of the problem? I mentioned here two points, one is the PF value, one is the system efficiency