What is the minimum lighting level required for easily accessible stairs in vertical transportation?

The minimum lighting level required for easily accessible stairs in vertical transportation is 150 lux. This lighting level is set to ensure safety and visibility for users navigating stairways, which can be areas of potential risk for trips and falls. Adequate lighting helps illuminate stairs adequately, allowing individuals to clearly see their steps, handrails, and any obstacles that may be present.

The choice of 150 lux reflects a balance between sufficient illumination for safety needs and energy efficiency. This standard is often adopted in various building regulations and guidelines to promote safe building practices. Standards like these are particularly relevant in the Estidama Pearl Building Rating System, which emphasizes sustainable and safe design principles in the development of buildings in Abu Dhabi and the broader UAE context.

While other options present higher lux levels, they are not the minimum requirements, thus not necessary for meeting basic safety standards in a way that's both effective and sustainable.