2. Look at the brand and size of the chip. The brands are Riya, Kerui, Puri, Xu Ming, Jingyuan and New Century. The front is better, the bigger the chip, the better.
3, look at BIN, that is, color temperature partition and voltage BIN, the finer the better.
4, look at attenuation, need to do aging test, the smaller the light attenuation, the better.
5. Look at the practical application. It would be nice if there were suitable and cheap lenses and aluminum substrates on the market. If the lens and aluminum substrate need to be opened, more power will be put in, 1W, current: 350ma, voltage: 2.8-4.0V, brightness: 80- 130LM, and color temperature: 3000-6544.
Extended data
Precautions for purchase
1, look at the brightness
Generally, the brightness of led beads is different, and the price is also different. Generally, the greater the brightness, the more expensive the price and the better the decorative performance. When buying, you can let the led light up for a while to see if there is a how bright.
2, measure the antistatic ability
The led with strong antistatic ability has a long life, so it is expensive. Generally, an led with antistatic ability greater than 700V can be considered as a real led, and it is not easy to burn out due to unstable voltage during use.
3, the wavelength of light
It depends on whether the consistency of pearlescent wavelength of led lamp meets the standard. Led beads with the same wavelength have the same light color. If consistent colors are required, the price is high. Therefore, when buying led lamp beads, businesses must take out led spectrometers for testing to see if the light wavelengths are the same.
4. Safety performance
The safety performance directly determines the service life of led lamp beads. The colloid of ordinary led lamp beads is generally epoxy resin, and there are also led lamp beads with ultraviolet protection and flame retardancy on the market, which are naturally more expensive, but the safety performance of this led lamp bead is generally higher, especially when installed outdoors, so it can be used with confidence.