Fénycsökkenés

Fénycsökkenés, or light pollution, refers to the excessive or misdirected use of artificial light at night. It encompasses several types of light pollution, including sky glow, glare, light trespass, and clutter. Sky glow is the brightening of the night sky over inhabited areas, making it difficult to observe stars. Glare is the excessive brightness that causes visual discomfort. Light trespass occurs when light spills onto areas where it is not intended or needed, such as a neighbor's property. Clutter refers to confusing and excessive groupings of light sources.

The primary causes of light pollution are inefficient lighting fixtures that emit light in all directions, including upwards, and the overuse of artificial lighting. While artificial light has many benefits, such as enhancing safety and extending activity hours, its excessive use can have negative consequences. These include disrupting natural ecosystems, as many animals rely on darkness for navigation, foraging, and reproduction. It can also impact human health by interfering with circadian rhythms, potentially leading to sleep disorders. Furthermore, light pollution wastes energy and contributes to carbon emissions.

Mitigating light pollution involves using shielded light fixtures that direct light downwards where it is needed, employing lower intensity lighting, and using timers or motion sensors to reduce unnecessary illumination. Choosing warmer color temperature lights can also reduce their disruptive effects. Awareness and responsible lighting practices are crucial to preserving dark skies and minimizing the negative impacts of artificial light.