The latest BS5266 gives details for different types of buildings and their use and now gives illuminance levels for specific locations within a building. It explains that emergency lighting is for use in a power cut and adds the need to illuminate not only the immediate area outside an exit door but also to a place of safety. It also gives guidance on glare & how to avoid it.
Basic Design Principles
Points of Emphasis - The sitting of Luminaires
Essential Locations – Specific areas to be Protected
Essential Locations for Exit Signs and Their Viewing Distances
High Risk Areas