If perimeter lighting is inadequate, which risk is increased?

• A. Reduced energy consumption.
• B. Cameras functioning better at night.
• C. Perimeter becoming more secure due to fewer shadows.
• D. Increased risk of undetected activity.

Answer: (D)

Detection capability relies on adequate perimeter lighting. When lighting is inadequate, visibility for both people patrolling the area and surveillance cameras drops. Low illumination reduces contrast and increases image noise, making it harder to notice or identify intruders. That directly raises the chance that activity around the perimeter goes undetected, increasing risk. The other options don’t fit: insufficient lighting doesn’t reduce energy use, doesn’t make cameras work better at night, and doesn’t make the perimeter more secure or reduce shadows—often it creates dark spots that can be exploited.