1. The difference between lamp bead bracket materials: At present, there are aluminum brackets, brass brackets, copper brackets, etc. on the market. Aluminum brackets are the cheapest, and copper brackets are the most expensive, with a price difference of more than ten times. Even for copper brackets, the price of silver plating varies. The market is generally called good brackets, and most of them are made of silver-plated brass.

Brackets of different materials have different effects on the performance of LEDs, especially on light decay. This is mainly because the thermal conductivity of copper is much better than that of iron. The thermal conductivity of copper is 398W (m.k), while the thermal conductivity of iron is only about 50W (m.k), which is only 1/8 of the former, and the thickness of the plating layer of the bracket. are also closely related. When choosing a bracket, it is also necessary to pay attention to whether the size of the bowl of the bracket matches the light-emitting chip and the die. The quality of the matching quality directly affects the optical effect of the white LED, otherwise it will easily cause the spot shape asymmetry, yellow circle, and Black spots, etc., directly affect the quality of the product.

The difference between the aluminum bracket and the copper bracket is easy to distinguish (get it in your hand, and the light is aluminum). In addition, some factories do not use aluminum but also use iron brackets. Of course, no matter what bracket is used, take a lamp bead to make it. The destruction test will tell you how many purchases will think of this, especially the purchase of some finished products. You don't even see what the lamp beads look like, only the finished products. Therefore, our lighting here reminds everyone to pay attention to the bracket material.

2. Difference in chip size: The reported chip size is usually in mil. If there is no high-magnification measuring microscope, it is generally difficult to distinguish. The larger the chip, the brighter the chip. We can compare the chip size by calculating the chip area, such as 23X10, the chip The area of the chip is 230 square mil. It is a good way to use the chip area to distinguish the chip size.

3. The difference of welding wire materials: The chip and the bracket are connected by gold wire welding method. At present, there are two kinds of alloy wire and pure gold wire on the market. The pure gold wire is the best. The gold wire is divided into 0.7, 0.9, 1.0, 1.2, etc., the thicker the gold wire, the lower the heat group and the longer the life. All you need to know about the material and diameter of the gold wire.