The reporter compared the products of several exhibitors.
One is the T8 lamp from the traditional lighting manufacturer Foshan Lighting, 18W, 120 lamp beads, priced 19~20 yuan, glass cover. The life guarantee is 20,000 hours.
For this lamp, a contract energy management company person analyzes according to his own purchasing experience. If the cost of each lamp is 0.15 yuan, the cost of 120 lamp beads is 18 yuan, plus the cost of the power module and the heat sink. Manufacturers can't make ends meet on this tube.
But the manufacturer can give such a price, speculating that the possible reasons are: First, the quality of the lamp bead is normal, so the cost is greatly reduced. Second, the power supply design part is “slimmingâ€, which saves some voltage and power compensation design.
According to the life guarantee, the manufacturer usually provides 30,000 hours of life. This 20,000-hour-long T8 tube, if not the company's modesty to its own products, can explain the strength of product quality from the side.
The second T8 tube comes from another domestic big company, Guoxing Optoelectronics, 16W, price 40 yuan, glass cover. 120 lights inside, 30,000 hours of life guarantee.
Roughly calculated, the power of each lamp bead is 0.15W. If the cost of each lamp bead is 0.15 yuan, the cost of the lamp bead is about 18 yuan, and the cost of the whole lamp is about 38 yuan. If the price is 40 yuan, there is still some profit.
The third paragraph is the domestic large factory sunshine lighting, 18W T8 tube, which is very proud of the export market. According to the on-site personnel, the product uses aluminum substrate for heat dissipation and has a life of 30,000 hours. The lampshade is made of PC material. According to the number of lumens, the price ranges from 60 yuan to 200 yuan. The internal LED lamp power is 0.06W and a total of 300 lamp beads.
The reporter saw from the Sunlight official website that the product features advanced electroplated zinc color coated steel plate bracket, ABS end cover, T8 light source, electronic ballast, and the bracket has the advantages of moisture resistance, weather resistance and chemical resistance. The structure is simple and easy to install. Efficient open bracket luminaires for easy connection into light strips.
But one industry insider pointed out that 0.06W per lamp is worth pondering. Generally speaking, the lamp beads in the lamp will not always be in full-load state, that is, 100% of the light will not be emitted. If it is always at full load, it will affect the life of the lamp. In addition, 300 lamp beads, according to the standard of single-row lamp beads and tube length of 1.2 meters, are difficult to accommodate. If it is made into a double arrangement, there will be overlapping of light, resulting in wasted light resources.
Assume that each lamp bead is very good, calculated according to 0.16 yuan per 0.06W lamp bead, the cost of the lamp bead is 45 yuan, plus the power drive, aluminum alloy heat sink, the cost of each 18W T8 lamp At around 60 yuan.
According to this price, manufacturers can't earn money. In fact, the price of a good lamp bead may be higher than 0.15 yuan. In this way, manufacturers will be unable to make ends meet.
So, why can manufacturers give such a price? The answer of a visitor is: the actual effect is inconsistent with the parameters, some parts of the product are missing or cut corners, and the market share is seized by price. For example, the quality of the lamp bead is not guaranteed. The lamp bead is the core of the entire LED luminaire. There are many problems caused by the failure of the lamp bead:
The first is that the light quality is not good, and it is easy to use eyes for a long time. Second, the lamp beads are easily damaged. If one of the beads is damaged, the user finds it difficult. Third, the heat treatment cannot be guaranteed. The better the heat dissipation of the LED lamp bead, the lower the light decay, and the longer the service life will be. Therefore, to ensure that LED lamps can have high performance, it is necessary to improve their heat dissipation performance.
In addition, rough work is also a key point. For example, the heat sink substrate, some manufacturers work fine, the hand feel will be relatively smooth, the transition at the bend is stable, not easy to hurt the hand. Rough processing is the opposite.
The power module part is also a key area for cutting corners. To ensure the quality and safety of LED luminaires, a power compensation design is required. If this part of the design is omitted, such as lowering the ballast or omitting the voltage regulator capacitor, the cost will be reduced, but the power factor of the power supply may be less than 0.9. In this way, the voltage fluctuation of the load during the operation of the LED lamp tube is large, the stroboscopic problem occurs, and the safety of use is also reduced.
Although LED lighting is an irreversible trend in future applications, as far as the current status quo is concerned, a small T8 tube has many problems, and the LED industry faces many problems. In the past, the market was filled with unqualified fluorescent lamps, which made consumers have no confidence in the industry. In the era of LED, if manufacturers can not more scientific spirit, less business practices, and do a good job of LED lighting products, then LED lighting products will one day become a waste product.
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