The correct answer is D. annually.
In the ASIS PSP Body of Knowledge, lighting is specifically included as an environmental factor that impacts physical security assessment and as a structural security countermeasure. PSP also covers inspection techniques, maintenance of systems and hardware, and ongoing evaluation throughout the security system life cycle.
Exterior security lighting must be evaluated after installation to confirm that the lighting levels, coverage, shadows, glare, blind spots, and protected areas meet the intended security objective. After the initial installation survey, the lighting system should be reviewed annually to ensure it still provides effective illumination and has not been affected by lamp deterioration, damaged fixtures, vegetation growth, changed site conditions, or maintenance issues.
Security lighting guidance also supports an annual security lighting survey, especially when lighting is part of the facility’s protective security program. APTA’s security lighting recommended practice states that a security lighting survey should be performed on an annual basis or when the built environment changes.
Weekly or monthly checks may be useful for routine maintenance, damaged lamps, or outages, but the formal lighting survey after installation is normally conducted annually.
Therefore, the best answer is D. annually.
