17-269

cut-off

1. technique used for concealing lamps and surfaces of high luminance from direct view in order to reduce glare

2. technique used for concealing lamps and surfaces of high luminance to reduce light emission above the horizontal

NOTE In outdoor lighting, cut-off classifications define the luminous intensity limits in two illumination zones that occur within the range of 80° to 180° above nadir. Light emitted in the 80° to 90° zone is more likely to contribute to glare, and light emitted above the horizontal is more likely to contribute to sky glow.

Theme by Danetsoft and Danang Probo Sayekti inspired by Maksimer