Artificial light at night

Artificial light at night refers to human-made lighting, such as streetlights, building illumination, and vehicle headlights, that illuminates the environment during nighttime. While essential for safety, security, and practicality, excessive or poorly managed artificial lighting can disrupt natural rhythms, affect wildlife, and obscure the night sky. It contributes to light pollution, reducing the visibility of stars and affecting ecosystems that rely on natural dark periods. Balancing artificial lighting needs with minimizing environmental and astronomical impacts is important for preserving natural darkness and promoting ecological health.