Luminance Ratio

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Luminance Ratio

a dimensionless quantity used in illuminating engineering to express quantitatively the difference between visual (light) sensations evoked by two adjacent surfaces of the same color. If L₁ and L₂ are the luminances of the surfaces being compared and L₁ = L₂ + nΔL, where ΔL is the luminance threshold, or minimum difference of luminance that can be discerned by eye, the luminance ratio of the first surface to the second will be equal to n.

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No references found			IBL technique is particularly useful for visual comfort and performance metrics, where interior luminance ratios and accurate depiction of window luminance distributions are critical. Evalution of high dynamic range image-based sky models in lighting ... by Inanici, Mehlika / Leukos elliptipar's asymmetric reflector produces an even wash of light across a surface from one edge, helping to maintain comfortable luminance ratios in low-energy spaces. The Lighting Quotient Unveils New Corporate Identity at Greenbuild ... by Business Wire The system creates balanced luminance ratios with energy usage at 0. Architectural Lighting Manufacturer Ushers in a New Generation as ... by Business Wire			lumen method lumen per watt lumen-hour Lumen-Second Lumena lumerg Lumet, Sidney Lumière brothers Lumière, Louis Jean Lumiere, Louis Jean and Auguste Lumière, Louis Jean and Auguste Lumiflavin lumiline lamp luminaire luminaire classification luminaire dirt-depreciation factor luminaire efficiency Luminaire, Recessed Luminance luminance carrier luminance channel luminance contrast Luminance Factor Luminance Meter luminance primary Luminance Ratio luminance signal Luminescence Luminescence Analysis luminescent luminescent cell Luminescent Center luminescent dye Luminescent Organism Luminescent Organs luminescent screen luminism luminol luminophor luminosity Luminosity Class luminosity classes luminosity curve luminosity factor Luminosity Function luminosity monitor Luminosity of a Star luminous Luminous Bacteria luminous blue variable luminous ceiling			luminaire efficiency Luminaire, Recessed luminaires luminaires Luminal Luminal Luminal Luminal (drug) Luminal (drug) Luminal (drug) Luminal CCK-Releasing Factor Luminal Diameter to Wall Thickness Luminal Front Velocity luminal phase digestion luminal phase digestion luminal phase digestion luminal phase digestion Luminal Sodium luminance luminance luminance luminance luminance carrier luminance channel luminance contrast Luminance Element luminance factor Luminance Meter luminance primary Luminance Quantization Table Luminance Ratio luminance signal Luminance Signal-to-Noise Ratio luminance unit Luminance-Bandwidth-Chrominance Luminance-Chrominance-Chrominance Luminance/Chrominance Luminance; Chroma: Blue; Chroma: Red Luminant luminaria Luminarias luminaries luminaries luminarism luminary luminary Luminate Lumination Lumine luminesce luminesced luminescence luminescence luminescence Luminescence Analysis Luminescence Detector luminescence resonance energy transfer luminescent luminescent luminescent Luminescent bacteria

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