Why Zhongshan LED fluorescent tube prices vary widely

Edit：   Browse：675  Date：2014-07-05

Zhongshan LED lamp price difference between tens of dollars / support. Is the expert, explained to the guests aware of this huge price difference is not easy. Take T8, 1200MM, 18W LED lamp: the market price has sold 46 yuan / piece, it was sold for the price of 80 yuan / support, why prices vary so much? Prices of different reasons, is that there is a difference LED lamp selected materials. Let's start with LED lamp composed of six main material --- LED light source, power, profiles, PC cover, lamp holder to an explanation of it.

One. LED light, LED fluorescent tube current Zhongshan have adopted the basic 2835,3014 and 3528 these three lights.

Judge the quality of the chip, we first look at the chip brand? Then confirm the chip size comparison are the same, or similar, final confirmation chip level is A product? Project product? B file product? Discs? Regardless of the brand, the same grade chips, the price difference is actually very small, in other words, whether it is crystal yuan, Jia Guang, CMO, Thai Valley, New Century chip, as long as the A grade, the same size as the chip size, the quality is there is no difference. LED package to confirm the level of quality of materials used, such as crossing the silver layer thickness bracket? Silicone quality? Phosphor quality? Dispensing process control. . . Judging from the quality of the LED light source parameters, mainly the brightness is high? CRI is how much? Consistency these days?

      As we all know, 3528 is the wattage 0.0625W / pcs, single lumen 6-7LM, generally with less than 20mA driving lights, belongs to a small power source. 3014 is 0.1W, the single lumen 10-12LM, driving lights with 30mA, belonging to small and medium-power light source wattage 2835 is 0.2W / stars, belonging to the high-power light source, single lumen 22-24LM, generally with 60mA driving lights. Because SMD LED beads price almost single, relatively speaking, fewer lamp beads, the cheaper the price.

      Take 1.2 m 18W LED fluorescent tube is
With 3528 beads, each bead number needed light 18W ÷ 0.0625W / pcs = 288 calculated by the light source brightness: 288 * 6LM * 0.85 safety factor = 1468LM light Cost: 288 * 0.12 yuan / pcs = $ 38.
With 3014 lamp beads, each bead number needed light 18W ÷ 0.1W / pcs = 180 calculated by the light source brightness: 180 * 10LM * 0.85 safety factor = 1530LM light Cost: 180 * 0.18 yuan / pcs = 32.4 yuan.
With 2835 lamp beads, each bead number needed light 18W ÷ 0.2W / pcs = 90 is calculated according to the brightness of the light source: 90 * 22LM * 0.85 safety factor = 1683LM light Cost: 90 * 0.16 yuan / pcs = 14.4 yuan.

Two. Power: LED fluorescent lamp power is divided into two kinds of non-isolated and isolated.

A non-isolated constant current power supply: non-isolated load refers to the input terminal and a direct connection, so there is the risk of electric shock load touch. Advantages of non-isolated constant current source circuit design is simple and the manufacturing cost is not high. The disadvantage is the high-voltage AC power supply will be introduced into the load side, causing the risk of electric shock.

Two isolated constant current power supply: input means and output isolation transformer isolation. However, both the input and output isolation up. Advantages isolated constant current source is a circuit design complexity, to avoid the risk of electric shock. The disadvantage is that the efficiency of the power supply will be reduced, high manufacturing costs, the volume is relatively large.

  Large price difference between two kinds of power, non-isolated power supply 11 yuan / month, isolated power is 26 yuan / month, explained to the guests the power quality materials, allowing guests to make the most appropriate choice. The market also has a lot of non-isolated power supply is 6-9 yuan / month, isolated power 15-18 yuan / month, no power also see electronic parts selection.

Three. Profiles, structure: LED lamps on the market today are basically two types of profiles: Half plastic tubes and plastic tubes half.

1, plastic tube: Early LED lamp uses a plastic tube, because the main use of non-isolated power supply, in order to avoid electric shock problem, it is more desirable to use plastic tubes. This fluorescent biggest problem is the heat problem, because all the heat sealed in a tube and can not spread it out, the light fades very serious, is not recommended. Price is around 2 Rev. 3 yuan / package.
2, half plastic half-tubes: now sold on the market are basically LED fluorescent PC half of this half aluminum, half of that needed translucent plastic, translucent and the need for cooling is not required that half of the made of aluminum alloy. Of course, the power is on the tubes inside, so, LED's heat combined with the power of heat is quite big, because this lamp power is usually around 20W. Also an important indicator of the thickness of aluminum, but also affect the cooling effect of the current aluminum thickness 0.6-0.8MM basically, usually about 13 yuan / sets, quality guaranteed. In addition, there are many on the market 0.2-0.5MM thickness and color of aluminum compared to Asia, to prove containing impurities, which is generally 5-7 yuan / sets, the price difference is about 5 yuan / sets.

Four. Light board: glass lamp light board is generally divided into two kinds of panels with aluminum plate, aluminum plate of the most commonly used
LED chip through a certain arrangement of aluminum sheet attached to the electronic circuit board, or PCB, and then fixed in aluminum radiator top. PCB thermal conductivity of glass fibers is 20w/mk, the thermal conductivity of aluminum is 200w/mk. The larger the thermal conductivity, thermal conductivity, the better the heat transfer. But not the same quality aluminum plate, make sure there is no aluminum-containing impurities, on the one hand through the aluminum V-CUT bit is smooth, cutting aluminum, with aluminum-containing impurities due when cutting aluminum, easy to produce aluminum blade when cutting V-CUT position is not smooth; thermal conductivity of aluminum-containing impurities will be greatly reduced, of course, the price is a lot cheaper, under normal circumstances, the price difference of about one-third.

Five. Base: metal lamp with a plastic cap, plastic cap is divided into two solid needle cap lamp, hollow needle.

Fixed a useful way of glue fixed across the lamp, the lamp is also useful in the two screws. On safety, environmental protection is concerned, the manner with screws majority of consumer adoption. Now try using screws hidden way, very beautiful and upscale. From the price in terms of multi-metal lamp 0.5 yuan / month, solid pin plastic cap 2 yuan / month, hollow needle plastic cap 1 yuan / month.

VI. PC cover: from light transmittance can be divided into transparent PC cover, milky PC cover material from the material of PC, optical-grade PC material.

Current market transparency mask transmittance can reach 88-95% transmittance milky PC cover in 70-86%. If one does not add mask lamp luminous flux is 2000lm, now give it with only 88 percent light transmittance milky PC cover, then it is only the actual flux 1760lm flux. If it is coupled to the light transmittance of the transparent mask is 95%, then it will have the actual flux 1900lm, similarly transparent mask. PC is more common, cost-effective. Unit 2-3 yuan / month.

Optical-grade PC material is expensive, priced 5-6 yuan / month. Seldom used. However, some domestic customers are designated with optical-grade PC material shade.

In short: Zhongshan LED fluorescent tube reason why prices fluctuate greatly, there is a difference it is selected materials. You pay, you may not be good, good price will be relatively high, the quality of what determines what price. Select the products that best meet their own circumstances can not seek high-priced or high-parameters blindly. According they need product positioning, according to the above six to choose cost-effective products.

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