In lBo-10: Light Pollution Reduction, when should safety lights be on?

In the context of Light Pollution Reduction as specified in the Estidama Pearl Building Rating System (PBRS), the guidelines for the operation of safety lights are carefully calibrated to balance safety with the minimization of light pollution. The correct time frame given is from 11 pm to 7 am.

This period aligns with the times when most people are likely to be at home and natural darkness is at its peak, which means the need for lighting to ensure safety still exists while simultaneously ensuring that unnecessary light exposure is minimized during the late-night to early morning hours. These times are chosen based on patterns of human activity, where reduced light is more manageable, and the risk of accidents or safety concerns are still addressed by having safety lights operational.

Operational times earlier than 11 pm could result in excess light pollution during hours of lower activity, disturbing both wildlife and the natural balance of the environment. By designating the safety lights to be on during this specific duration, there is a concerted effort to protect both human safety and the ecological integrity of the surrounding area.

Overall, this scheduling reflects a commitment to both public safety and environmental stewardship, demonstrating the principles outlined in the PBRS regarding the reduction of light pollution while maintaining adequate safety standards.