Preferably use a triple detector: presence detectors + light meter for dimming.
Keep operating hours of lighting down by motion detectors that shut off the light when it is not needed, both production lights and in the hallways.
Daylight dimmers shut off or decrease the output of the light when it is not needed, e.g. during daytime. These can also be combined with motion detectors to keep some light on, but at less power in e.g. warehouses where some ambient lighting might be needed, but not at 100%
A rule-of-thumb saving is 30-40% of the electricity cost for lighting.