LED lights with purchase guide

1, LED lights with the chip: chips are made in Taiwan and Taiwan chips, as well as imported chips (including the United States chip, Japan chip, the German chip, etc.). Different chips, the price difference is very big. Currently the most expensive is the United States chip, followed by the Japanese chip and the German chip, the price is moderate Taiwan chip. What specific chip? To achieve what kind of effect?

2, LED package: sub-resin package and silicone package. The price of the resin package should be cheaper, because the cooling performance is a bit weak, the others are the same. Silicone package thermal performance, so the price is slightly more expensive than the resin package.

3, LED color consistency: At present, there are many domestic packaging plant, together with thousands of large and small, of course, the strength of the strength of the points. There are many small packaging plant because there is no spectrophotometric color machine, so either light-color separation, or is outgoing, so it is difficult to guarantee the quality. Did not go through spectral color separation of the LED, its color consistency is poor, installed in the LED light with the effect is not so good, of course, the price difference is relatively large.

4, LED welding effect: The assembly of LED light strip is divided into manual soldering and machine soldering. Manual soldering is using soldering iron. The most primitive way is soldering. The solder quantity of solder spot is uneven, , At the same time there will be different degrees of tin tip appears, this is a typical phenomenon of manual welding. First, the operation of this product out of the way the appearance of ugly (solder joint size inconsistencies, flux residues, solder joints are not smooth, LED packaging is bad, etc.), the second is the electrostatic protection is not good, many LED chips were breakdown, Lead to the phenomenon of light or not bright when the power. Machine welding is different, the use of SMT chip technology, with solder paste and reflow soldering process. Therefore, the LED lamp with a relatively smooth solder joints and the amount of solder will not be more arc-shaped arc from the FPC pad to the LED electrode extends not only after welding the product looks beautiful (solder the same size, smooth solder joints , No flux residue, LED package intact), but does not appear the phenomenon of chip is burned by static electricity. At the same time, LED's position and direction are more beautiful. This can be directly seen from the appearance.

5, FPC material: FPC partial pressure extension of copper and copper two, deposited copper cheaper, more expensive rolled copper. Copper pads in the bending of the easy off, and rolling copper will not. The specific use of which material FPC, depends on the purchaser to make their own decisions based on the use of the environment.

6, FPC has no environmental certification, UL certification? LED patent or not. There are certified and patented, the price is more expensive, not cheap.

7, LED brightness: different brightness of the LED prices are different, ordinary brightness and highlight the difference between the price of LED is quite different. Therefore, the time of purchase must clearly know what kind of brightness they need, so as to accurately locate their own products.

8, LED color: different colors, the price is not the same. White, green Color and spectral color separation is more difficult, so the price is higher than the price of other colors; red, yellow, blue and other color separation is easier, and the consistency is better, so the price a little cheaper. Special colors such as purple, brown, etc. due to color reasons, the price is the most expensive.

9, the size of LED: different size LED, the price is different. Such as 0603 LED and 1210 (ie 3528) LED, the price difference between larger; and 1210 and 5050 specifications of the LED prices and a difference of one step.

10, to see the cleanliness of LED lights with the surface. If using LED technology to produce LED lights, the surface of the cleanliness is very good, do not see any impurities and stains. However, if using the hand-welding process cottage version of LED lights, the surface no matter how to clean, there will be traces of stains and cleaning, while FPC surface will have flux and tin residue.

11, look at the packaging. Regular LED lights with anti-static coil tray packaging, usually 5 meters a roll or 10 meters roll, and then outside the anti-static moisture-proof bag sealed. The cottage version of the LED lights with the cost savings, and the use of recovery reel plate, and then no anti-static moisture-proof bags, carefully read the coil tray can be seen on the appearance of removal of the label left traces and scratches.

12, see the label. Regular LED lights with bags and reel tray above will have a printed label, not a printed label. The cottage version of the label is printed, while the specifications and parameters are not uniform.

13, see the attachment. Regular LED lights will be accompanied by instructions in the box and the lamp with specifications, but also with LED lights with a connector or deck; and cottage version of the LED light with the package does not have these attachments, because After all, some manufacturers can save the province.