Practical Application

1. Discuss site-specific security lighting issues and concerns with the RSO. Identify any lighting zones with fixtures that must be unshielded for security purposes or have defined lumen (lm) requirements (i.e. require light measurement).
2. Review the audit results to identify any fixtures that have unnecessarily high wattage, are manually controlled, are decorative lighting fixtures that remain on throughout the night, or currently emit light upwards at any angle (more than 90 degrees from straight down).
3. Retrofit site lighting with LED fixtures where possible.
4. Install photo sensors or time-clock controls on non-security site lighting.
5. Determine whether any fixtures emit light past the property boundary during a night assessment, if not already determined during the audit.
6. Talk with the FM to determine how interior lighting is controlled and how to ensure that non-security lights are turned off when the building is unoccupied to avoid unnecessary light spillage (see Energy: Automatic Lighting Controls).

Figure 5: U.S. Embassy N’Djamena site lighting plan

Image Source: Moore Ruble Yudell