2, look at the brightness of your lamp bead can reach how many LM(lumen), LM(lumen) is a measure of the lamp bead brightness unit.
3, look at the light to see whether the light is uniform color is consistent, good quality lamp bead light is very uniform, the color is consistent. Poor quality lamp beads will appear a lamp bead brightness bright, a lamp bead dark phenomenon, the luminous color is messy and not uniform, there will be obvious dark areas.
4, look at the chip to see the chip and chip size, the chip is the determining factor of the quality of the lamp bead, in general, the greater the stability of the chip, the higher the brightness, the better the heat dissipation. This is the most important, because the chip directly determines the color rendering index, brightness, and anti-decay degree.