adjust the position of the light box and replace the lamp tube.

1. Adjust the position of light box: The position or environment of light box with door head will also affect its brightness and color reproduction. You can adjust the position of the light box or improve the surrounding environment to get better results.

2. Replace the lamp tube: for problems caused by aging or damage of the lamp tube, the lamp tube can be replaced. The door light box adopts fluorescent lamp tube or LED light bar, and the suitable lamp tube can be selected for replacement according to the actual situation.