1. The phenomenon of surrounding darkening is often the problem of the light guide plate.
2. The light turns blue or yellow 1) Adjust the distance between the lamp bead and the light guide plate, or change 3T to 4T, because the refractive index of blue light and yellow light is different. 2) It may also be the problem of the lamp bead, replace the lamp bead.
3. The aluminum frame has large seams
4. Bright spots and bright spots appear
5. The appearance of water ripples is caused by current pulsation. Replace the power supply.
6. The measured value of luminous flux is low, using a distributed photometer and selecting high-quality lamp beads
7. Other PMMAs expand when exposed to heat, and the lamp beads may also appear bluish or even dead.