1. Reduce the use of decorative lighting. 

2. Use of covered bulbs that light facing downwards.

3. Use LED Light.

4. Minimizing the use of lights.

5. Check and put to stop the use of needless lighting during the day.

Light pollution is the presence of artificial lighting in dark conditions ... offices, factories, street lights, and illuminated sports venues. Light pollution not only affects human health, imbalances the ecosystem, but also causes a waste of energy. So there are a few ways to prevent light pollution such as using only the right light and turning off the lights or using a timer when not needed.

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Một  số biện pháp 

+ Use only the right light

+ Turn off the lights or use a timer when it's not needed.