1. A unit of luminance equal to one lumen per square foot, used to measure the brightness of a surface or light source.
Usage: technical; plural form of footlambert; commonly used in lighting design and photography

Examples

• The display screen was calibrated to emit 100 footlamberts of brightness.
• Lighting engineers specified 50 footlamberts for the museum gallery to protect the artwork.
• The monitor's luminance was measured in footlamberts to ensure proper visibility.
• Professional video production requires consistent footlamberts across all displays.
• The projection screen achieved 200 footlamberts in the darkened theater.