Final answer:
A light occupancy hazard involves situations where light can exacerbate danger following an emergency alarm, causing uncertainty and potential physical risk. Light pollution impacts the environment and human health by wasting energy and possibly contributing to hazardous conditions due to poor visibility.
Step-by-step explanation:
A light occupancy hazard refers to a situation where there is uncertainty over whether a serious fire or hazard awaits after an alarm, specifically one that can be exacerbated by the presence of light or the difficulty it may cause in evaluating a situation. In many scenarios, this could involve the potential for extreme physical danger. For example, lighting in an area might cause shadows or glare that obscure vision and hamper the ability to assess and respond to emergencies promptly.
Light pollution, from sources such as car headlights or ambient lighting, has wider implications beyond astronomy; it impacts ecological balances and human health, contributing to unnecessary energy consumption as it illuminates more than the intended area, with excess light being absorbed as heat or escaping to space. This could represent a poor design where light is not being utilized effectively or is creating unwanted byproducts such as glare or shadows.
In the context of stage lighting, the precise arrangement and control of lighting, as communicated through a light plot, is crucial in highlighting elements of the performance and setting the intended mood, without introducing unintended hazards or distractions.