LEED AP Building Design and Construction (BD+C) Practice Exam

What is the correct action if the luminance exceeds the required levels during the daytime for externally illuminated signs?

1. Adjust the sign's size.

2. Switch to internally illuminated signs.

3. Implement restrictions on usage during daytime.

4. Modify the lighting system.

The correct answer is: Modify the lighting system.

When the luminance of externally illuminated signs exceeds the required levels during the daytime, the appropriate response is to modify the lighting system. This action directly addresses the issue of excessive brightness, which can lead to visual discomfort and affect the surrounding environment negatively. By adjusting the lighting system, you can control the intensity and distribution of light to ensure that it meets regulatory standards and does not create glare or light pollution. This may involve dimming the lights, changing the positioning of the light fixtures, or replacing the bulbs with those that produce less intense illumination. Proper management of luminance not only complies with guidelines but also promotes a more aesthetically pleasing and environmentally responsible use of lighting in outdoor signage. Other options, such as adjusting the sign's size, switching to internally illuminated signs, or implementing usage restrictions, do not directly resolve the issue of excessive brightness caused by the external lighting. They could potentially lead to complications or may not effectively reduce the luminance levels as required. Therefore, modifying the lighting system is the most effective and straightforward solution to ensure that the signs remain compliant and visually appropriate during daytime conditions.