Light pollution is every form of artificial light which shines outside the areas it is intended to illuminate, especially the light directed above the horizontal. The consequences include sky glow over towns and cities, glare, dazzle, reduced visibility at night and unnecessary energy consumption. In order to avoid those unwanted consequences, it is necessary to gradually do away with old inefficient technologies and replace them with modern energy-efficient ones.
Savings in energy with LED lights compared to Mercury and Sodium lamps is 50 to 80 %. The lifespan of LED lamps when working 10 hours a day is more than 14 years, which is 5 to 10 times more than for Mercury and Sodium lamps. A controlled, directed beam of light provides an even illumination of the street area. Lens-shape prevents the unwanted reflection of light.