7. Chip（LED light bulb)
The light-emitting body of LED is chip. The price varies greatly with different chips. Chips from Japan and the United States are more expensive. Generally, the prices of chips from Taiwan and China are lower than those from Japan and the United States (Cree).
8.(LED light bulb)
Chip size chip size is expressed by side length. The quality of large chip LED is better than that of small chip. The price is directly proportional to the wafer size.
9. (LED light bulb）
Colloid the colloid of ordinary LED is generally epoxy resin. Led with anti ultraviolet and fireproof agent is more expensive. High quality outdoor LED lighting should be anti ultraviolet and fireproof. Each product will have different designs. Different designs are suitable for different purposes. The reliability design of LED lighting includes: electrical safety, fire safety, applicable environmental safety, mechanical safety, health safety, safe use time and other factors. From the perspective of electrical safety, it shall comply with relevant international and national standards.
As LED is a new product, China's national standard lags behind, but the state provides product qualification test. The price of LED lighting with international safety certification (such as GS, CE, UL, etc.) and national product quality certificate is higher, because these products are reliable in safety design. Consumers should carefully identify the authenticity of the certificate. There are not many manufacturers with international safety certification and national product certificate.
(LED light bulb)
In terms of health, the price of products designed with non-toxic materials is high, especially indoor LED lighting. Don't be greedy for cheap and choose LED lighting with peculiar smell. Only a few LED manufacturers produce with non-toxic materials. The identification method can be directly separated by nose. The price of products with odor is much lower than that without odor. Toxins such as lead, mercury and cadmium need to be analyzed by professionals. From the perspective of applicable environmental safety, the price of LED products with reliable dust-proof and moisture-proof design and fireproof, ultraviolet and low-temperature cracking prevention materials is high.