Blue light photons have high energy and can excite fluorescence. Generally, the blue light of the blue LED is used to generate yellow light on the phosphor. After the yellow light is excited by the blue light, they are emitted together from the LED. We feel that it is white light. In fact, this is only a mixture of blue and yellow colors. Composite light.

The tissue used to receive light in the human eye is called the retina. If the brightness of the 400–500 nm blue light band in the light source is too high, the eye may cause photochemical damage to the retina after long-term direct view of the light source. The damage is mainly divided into two categories: damage caused by direct reaction of blue light with visual pigment in visual photoreceptor cells, and damage caused by reaction of blue light with lipofuscin in retinal pigment epithelial cells.

The LED lamp is an electroluminescent semiconductor material chip, which is cured with silver or white glue to the bracket, and then connected to the chip and the circuit board with silver wire or gold wire. The periphery is sealed with epoxy resin to protect the inner core wire. Function, and finally install the outer casing, so the LED lamp has good seismic performance.