Which control is used for occupancy-based automatic extinction of lighting?

Which control is used for occupancy-based automatic extinction of lighting?

• A. Automatic extinction using PIRs
• B. Photoelectric sensors to dim the light when it's daytime
• C. Dimmable lights
• D. Lights can be controlled using an automated lighting control system

Answer: (A)

Occupancy-based lighting relies on sensing whether a space is in use and turning off lights when it’s empty. A passive infrared sensor detects the presence of people by picking up body heat and movement, then signals the lighting controller to extinguish the lights after a short timeout. This is the most direct control for automatic extinction triggered by occupancy because it actively determines whether the space is occupied and responds accordingly. Other options relate to daylight dimming, manual or broader automated control, or don’t inherently provide occupancy-based shutdown on their own.

Occupancy-based lighting relies on sensing whether a space is in use and turning off lights when it’s empty. A passive infrared sensor detects the presence of people by picking up body heat and movement, then signals the lighting controller to extinguish the lights after a short timeout. This is the most direct control for automatic extinction triggered by occupancy because it actively determines whether the space is occupied and responds accordingly. Other options relate to daylight dimming, manual or broader automated control, or don’t inherently provide occupancy-based shutdown on their own.