Nowadays, LED shopping malls have a wide range of prices, with varying quality. Many reasons are due to the fact that in Chinese shopping malls, the appearance of products is similar and there are no patents, so price wars have led to varying quality. We all want good prices and quality, but it's difficult to find such things in the mall. A certain engineer who has been engaged in LED packaging engineering research and development technology management work in multiple packaging factories since 2006, but has now separated from LED work, told us about the various tricks he has learned about working in LED bead packaging factories for about 8 years, hoping that we can open our eyes and choose good LED bead products. How to Make LED Beads: Taking the imitation of Lumen high-power as an example, LED beads are made through production processes such as solidification, soldering, gluing, cover lens gluing, spectroscopy, packaging, etc. Each link has different technologies, but technology is not the first thing. The quality of the raw materials is the first thing, and the raw materials determine the price. For example, for 1w of 35mil crystal beads, there are 0.2 yuan, 0.4 yuan, 0.6 yuan, 0.8 yuan, and above 1 yuan, etc, Their prices are all reasonable, there is no violent price, but they are made up of different raw materials. The reporter has worked as an engineer in the packaging factory, and has seen all kinds of raw materials, such as high-quality packaging factories and waste packaging factories. They have all been there before, and now they have exposed their material selection and prices to us. We hope it can be helpful. Why are the prices of LED light beads so different? Taking a chip with a 35mil wafer as an example. On the mall, there are 1w 35mil crystal beads priced between 0.2 and 0.4 yuan (mostly sourced from packaging factories and products that split light from scratch, usually defective), 35mil crystal beads priced around 0.6 yuan (usually made of fake crystal elements), 35mil crystal beads priced around 0.8 yuan (usually made of ordinary materials and not very good ones), and 35mil crystal beads priced around 1 yuan (usually made by packaging factories with good material selection and quality). The informant will inform us of the materials used and products produced by each packaging factory (taking the imitation lumen lamp beads as an example, the same applies to other lamp beads). The process of fixed crystal is tricky: fixed crystal is to fix the chip on the bracket, and the primary information used is the bracket and chip. Here we talk about the quality of the chip and bracket. LED bead holders are tricky: Currently, there are aluminum holders, brass holders, and copper holders available in shopping malls. Aluminum holders are the cheapest, with a 1w imitation lumen priced at around 0.06 yuan, brass around 0.12 yuan, and copper around 0.16 yuan. Aluminum brackets have the worst thermal conductivity, followed by brass, and red copper is the best (we pay great attention to the heat dissipation of the shell when selecting it, and the quality of the power supply is also important. The price of the shell and power supply is very high, and often the selection of LED lamp beads is getting worse, sacrificing the cost to the end). Currently, the lamp beads priced around 0.4 to 0.6 yuan in shopping malls are mostly made of aluminum brackets, 0.6 to 0.8 yuan are mostly made of brass brackets, and 0.8 to 1 yuan are mostly made of copper brackets. Even if it is a copper bracket, there are 40, 60, 80, 100, and other options for the silver, and the prices vary greatly, ranging from 0.13 yuan to 0.18 yuan. A basic price of around 0.8 yuan is made of 60 yuan of silver, while a price of 1 yuan is made of over 80 yuan of silver. Many packaging factories promise that the brackets made of red copper are actually brass or adulterated red copper. LED chip scam: Low voltage SMD LED chips are now available in various shopping malls. Taking the example of chip 35, many lamp beads are made of fake chips. The chip size and appearance are the same as those of chip 35, but the chip structure is completely different, and the light attenuation and lifespan will also be different. For example, regular chip chips cost around 0.35 yuan, while counterfeit chips are priced within 0.2 yuan, resulting in significant price differences. Many packaging factories, due to bullying lamp manufacturers who are not familiar with chips, sell counterfeit chips for around 0.6 to 0.8 yuan, and some even sell them for 0.9 yuan. Regular high-power chips also have different levels of quality, with chips available in the market including specialty products, regular products, large wafers, and loose chips. For a certain brand of 35mil chip, the regular product is around 0.35 yuan. If you use good materials to make it, the price is around 1 yuan. If you use poor materials to make it, the price is around 0.8-1 yuan; The project cost is around 0.25 yuan, the loose piece cost is around 0.01 yuan, and the large round piece is also the sorting piece cost is around 0.25 yuan. These products are basically priced between 0.4 yuan and 0.8 yuan. LED lamps, with LED beads in the center and LED chips in the center, are also real chips, with significant price differences. We need to keep our eyes open and see clearly. Of course, inferior chips are cheap. Soldering process is tricky: Soldering is the process of connecting chips and racks with gold wire. The original material used is gold wire. Nowadays, there are two types of gold wire in shopping malls: alloy wire and gold wire. Gold wire is divided into 0.7, 0.9, 1.0, 1.2, etc. according to thickness. The cost of making 1W of alloy wire is around 0.01 yuan, and if the gold wire is 1.2, it is about 0.07 yuan. Many people make 1W, 0.4-0.6 yuan, 1W of 35mil so-called crystal bead, which is basically made of alloy wire; A 35 mil bead with a crystal element of around 0.8 yuan is made of approximately 1.0 gold wire, while a bead with a crystal element of around 1 yuan is made of approximately 1.2 gold wire. The ductility of gold is very good. LED light beads are lit and sealed, causing thermal expansion and contraction. If the alloy wire simply breaks the lamp, and if it is 1.0 gold wire, the lifespan will be shorter than 1.2 gold wire. However, simple testing cannot determine the lifespan. It is recommended to choose a good light bead with a longer lifespan. Fancy powder ordering process: The powder ordering process mainly involves coating fluorescent powder on the chip and making different white light color temperatures according to customer needs. The materials used include fluorescent powder and adhesive mixed with fluorescent powder. Generally, good fluorescent powder is currently priced at around 8 yuan per gram, and the relatively low-end fluorescent powder in China