___ detect motion and ambient light levels.

• A. Daylight harvesting devices
• B. Lighting controls
• C. Occupancy sensors
• D. Task tuning devices

Answer: (C)

The main idea here is devices that use sensing to decide when and how much lighting to provide, based on both presence and daylight. Occupancy sensors are designed to detect motion to determine if a space is occupied, and many models include an ambient light sensor to measure daylight levels. With both inputs, the system can turn lights on only when someone is present and dim or switch off when daylight is adequate, delivering energy savings and comfortable lighting. Daylight harvesting devices focus only on measuring ambient light and adjusting lighting accordingly, but they don’t detect occupancy. General lighting controls is a broad term and doesn’t specify the sensing capability, while task tuning devices aren’t the standard term for this function.