ANSI/IES LS-1-22, Lighting Science: Nomenclature and Definitions for Illuminating Engineering

The IES defines illumination engineering terms in ANSI/IES LS-1-22, is available here online. You can search terms by their first letter using the categories listed in the Categories window, by the first letter of the term in the alphabetical list below, or by typing the term in the search window. You can find the Introduction material for LS-1-22 on these pages:

•   Copyright, Disclaimer, and American National Standards Statement
•   Foreword, Nomenclature Committee members, Introduction, and Scope
•   Spectral Parameters Used in Illumination Engineering

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All Categories [10.0] Interior Lighting Applications    [10.5] Daylighting [11.0] Exterior Lighting Applications [12.0] Nonlighting Applications of Radiant Power [13.0] Lighting Controls [2.0] Electromagnetic Radiation [3.0] Light [4.0] Color [5.0] Visual Terms [6.0] Light Sources [7.0] Surfaces and Media for Light Control [8.0] Testing Procedures [9.0] Lighting Calculations [A] Annexes [T] Tables

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Results: 123

• l

• luminance difference threshold
• luminance factor, β
• luminance ratio
• luminance threshold
• luminescence
• luminous ceiling
• luminous efficacy of a source
• luminous efficacy of radiant flux
• luminous energy
• luminous exitance
• luminous fluence
• luminous fluence rate
• luminous flux
• luminous flux density at a surface
• luminous flux maintenance
• luminous intensity
• luminous intensity distribution curve
• luminous range
• luminous reflectance
• luminous sterisent
• luminous transmittance
• lux
• lux meter

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