LED instead of traditional lighting analysis

Now LED industry in order to open the civilian market, is designed to replace LED lamps, which directly replace 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, LED to replace traditional lighting what?

Many companies will expand LED in the same current while maintaining brightness to reduce the number of wick to save costs, or PCB compression area, or reduce safety devices, of course, we have to believe that the inherent advantages of Companies in Chinese compression in terms of cost. LED there is no market in the case of some enterprises are facing reshuffle, which is detrimental to the entire industry, the capital of the big head will exacerbate the decline of smes.

In the LED industry; the development of LED technology 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.

The following I come from several aspects to look at the LED to replace the traditional lighting of the disadvantages:

1 heat

LED heat resistance is poor 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.

Price 2

LED driver board at a temperature of 70 degrees may be only 5 years of life (home), far from the LED wick 10 years "concept". So compared to the same brightness of fluorescent lamp, fluorescent lamp, even if only 1 years of life, fluorescent lamp 1W1 yuan than 1W10 yuan LED is much more cost-effective. 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.

Efficiency 3

Why should considering the efficiency problem? One is the PF value, one is the system efficiency. Because most of the existing LED design are low power, by the pressure of the cost using passive PFC (valley fill), PF may be up to 90, far less than the active PFC at 99 efficiency for countries using LED to replace the fluorescent lamp luminous efficiency is very close to the pressure. The design of LED lamps (except outside the existing street) is mostly small power, such as 4.8W, 7.2W etc., the loss of the device accounted for a large proportion of isolation must be low, in order to improve the efficiency and the use of non isolation design not only do good in safety and efficiency. Is only about 80, is not ideal. Moreover, the existing LED manufacturers in the end how much of the LED light, do not provide accurate numerical value, often luminous brightness is much less than the nominal value.

4 light

LED an advantage but it is pure spectrum, in the visual above is a very serious disadvantage.

Eyes is not a long time observation of a single chromatography light source, LED cocoa dimming, but more trouble, more professional, need theory and a large number of research data, many are light material manufacturers or vendors or suppliers of LED light source is difficult to realize the scheme.

5 life

Life bottleneck in LED system LED driver board, often the wick is not damaged, the driving system has been broken. In addition LED attenuation is very serious, most of the existing LED home lighting volume restriction, protection is difficult to do well, the voltage fluctuation interference region.

6 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 screw interface LED lamp 7.8W the.

General LED lamps particles sense are obvious, and the position of light is relatively concentrated, when visual lamps will be tingling, this feeling only big power will appear in the other light source. So LED need to do better in the above design, in order to achieve in the case of ensuring the brightness, the point of light source as far as possible to expand the surface light source, improve the comfort of the eye. There is a lot of products will do LED light design, to save energy, and do not say low power efficiency when the problem, because the current in the coil exists, will lead to gray light design change is not continuous, that is to say the process according to the proportion of adjustment, the brightness of the LED will gradually become bright again suddenly light, depending on the sense of uncomfortable, dimming technology still need to be developed.