An elevator lobby is like the traffic crossing of any public area, they are the doors to the soul of the building. If in order to save energy the elevator lights are all turned off, then it is like extinguishing the soul of the building. As an alternative, one could retain a portion of the lighting to serve as a guide to direct people from adjacent areas. By doing so one could save energy but also keep the sould of the building intact, and bring about other benefits as well.
Indoor Elevator Lobby
Daylit Elevator Lobby
On/Off Type Lighting
There are two parts to the lighting - the main lights and the auxiliary lights.
Both the main and auxiliary lights are on.
Main lights are off, but auxiliary lights are left on.
The auxiliary lights are sensor controlled.
For lights that are dimmable.
All the lights are on.
The lights are dimmed, when someone approaches, the sensors bring the lights back to full.