In the lighting industry, the term “light pollution” is not new. It is a new source of environmental pollution after exhaust gas, wastewater, waste residue, and noise.

In daily life, common light pollution is mostly caused by the dizziness of pedestrians and drivers caused by the reflection of mirrored buildings, and the discomfort caused by unreasonable lighting at night.

It can harm the eyes, induce cancer, cause unfavorable emotions such as headache and anxiety, destroy the day and night work and rest of animals and plants and the ecological environment, etc. It also makes looking up at the starry sky an extravagant hope.