Light pollution is a new environmental pollution, light pollution has become one of the heat topic during the the two meetings of China's Parliament this year.

Mentioned about environmental pollution, plenty of people remind of dark sky, black river and rubbish etc., combine the pollution with fancy lighting. With the rapid development of the city, the applications of glass and high power light fixtures become wider, moreover, light beam has become a new source of the environmental pollution. However, our country still lacks relevant laws and specialized prosecution institutions, so that light pollution is threatening people's health with a tendency to gradually intensify. The use of mirrors, tiles and other high-reflectivity material for the exterior walls of various building is increasing, making the city shine and dazzle under the sunlight. And the city at night is brightly lit and neon-flashing, and has become a vertible "City of Lights". Coupled with the fact that the books and papers used for close reading and writing are becoming smoother and smoother, so that people almost drown themselves in an 'artificial environment' of 'strong light and weak color' anytime and anywhere, all of which belong to light pollution.

The cause of light pollution include the pollution caused by the reflection of the glass curtain wall, glazed brick wall, polished marble and various paints of urban buildings. After nightfall, the pollution caused by the strong beam of advertising lights in the malls, hotels and neon lights, black lights and rotated lights installed in the dancing club will form color light pollution. In addition, some high power and high enery consumption light fixtures are widely used without norms, objectively aggravating the degree of light pollution.