What are the common types of light pollution?

1) artificial sunlight. Refers to outdoor lighting at night, neon lights in shopping malls and hotels, light box advertisements and lighting signs, venue lighting, etc. It has the harm of seriously affecting people's normal work and rest, disturbing human biological clock and leading to low work efficiency during the day. Artificial sunlight can also harm birds and insects, and strong light may destroy the normal reproduction process of insects at night.

2) White light pollution. Refers to the pollution caused by the glass curtain wall, glazed tile wall, polished marble and various paints of buildings in the city when the sun shines strongly during the day. May become the chief culprit of traffic accidents; It has a negative impact on nearby residential buildings: reflected light will raise the indoor temperature, household appliances and furniture are prone to aging and fire.

3) Color light pollution. Refers to the light pollution caused by black light, rotating light and fluorescent light in ballroom, which is the most harmful to human body. The intensity of ultraviolet rays produced by the most common black light in ballroom is much higher than that in sunlight, which has a long-lasting harmful effect on human body. If the human body receives this radiation for a long time, it will induce nosebleeds, tooth loss, cataracts, and even cancer such as leukemia.