Outdoor Lighting: Physics, Vision And Perception Apr 2026

Upward-directed light reflecting off atmospheric particles, obscuring the stars.

Exposure to high-CCT (blue) light at night suppresses melatonin in humans and disrupts the migratory and mating patterns of wildlife. Design Principles for Success Outdoor Lighting: Physics, Vision and Perception

Use shields to direct light downward.

The light reflecting off a surface toward the eye. This is what we actually "see." Upward-directed light reflecting off atmospheric particles

The human eye adapts differently depending on the available light level. Outdoor Lighting: Physics, Vision and Perception

Crucial for outdoor safety. While we focus on a path, our peripheral vision (dominated by rods) detects movement in the shadows. 3. Perception and Psychology