In the closed-loop lighting control method the light level sensor views an area of the room that represents the ?

In the closed-loop lighting control method the light level sensor views an area of the room that represents the ?

• A. Area of the room occupied by the sensor
• B. Overall lighting level of all sources of light
• C. Color temperature of the room
• D. Number of light fixtures in the space

Answer: (B)

In closed-loop lighting control, the system relies on feedback from a light level sensor to monitor the room’s illuminance and adjust lighting to meet a target level. The sensor should view an area that represents the space’s overall brightness, capturing the light from all sources in that area so the control can respond accurately. That’s why the best choice is the overall lighting level of all sources. The sensor’s reading needs to reflect the actual ambient brightness experienced in the room, not just the light from a single fixture, the room’s color temperature, or the number of fixtures. The measurement guides how the system dimms or increases output to maintain the desired illumination.

In closed-loop lighting control, the system relies on feedback from a light level sensor to monitor the room’s illuminance and adjust lighting to meet a target level. The sensor should view an area that represents the space’s overall brightness, capturing the light from all sources in that area so the control can respond accurately.

That’s why the best choice is the overall lighting level of all sources. The sensor’s reading needs to reflect the actual ambient brightness experienced in the room, not just the light from a single fixture, the room’s color temperature, or the number of fixtures. The measurement guides how the system dimms or increases output to maintain the desired illumination.