tievalaisuus

Tievalaisuus refers to the phenomenon of light pollution originating from road lighting. This form of artificial light, typically from streetlights, can significantly impact the surrounding environment. It contributes to the overall skyglow observed in urban and suburban areas, obscuring fainter stars and interfering with astronomical observations.

The primary source of tievalaisuus is the emission of light from luminaires used for road illumination. These lights are designed to enhance visibility and safety for drivers and pedestrians. However, their intensity, spectral composition, and upward light emission can lead to unwanted light trespass onto adjacent properties and light pollution into the atmosphere.

Concerns regarding tievalaisuus include its ecological effects on nocturnal wildlife, such as disrupting insect behavior, bird migration patterns, and the natural cycles of plants. It can also affect human sleep patterns and health. Efforts to mitigate tievalaisuus involve using shielded light fixtures that direct light downwards, employing warmer color temperature LEDs, and optimizing lighting levels to only what is necessary for safety and visibility. Regulations and guidelines are increasingly being developed and implemented to reduce the impact of road lighting.