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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- baby
- back light
- back-up lamp
- backing lighting
- backward ray tracing
- bactericidal functions
- bactericidal lamp
- bactericidal radiation
- baffle
- balcony lights
- ballast
- ballast factor
- ballast-lamp photometric factor
- bank
- bar (of lights)
- bare (exposed) lamp
- barn doors
- barrel
- barrette
- base light
- batten
- beacon
- beam angle
- beam axis of a projector
- beam efficiency
- beam lights
- beam lumens
- beam projector
- beam spread (in any plane)
- bed
- biconical reflectance
- biconical transmittance
- bidirectional reflectance
- bidirectional reflectance distribution function (BRDF)
- bidirectional scatter distribution function (BSDF)
- bidirectional transmittance
- bidirectional transmittance distribution function (BTDF)
- bihemispherical reflectance
- bihemispherical transmittance
- bilateral sidelighting
- bin
- binocular portion of the visual field
- biological rhythm
- black light
- black light flux
- black light flux density
- blackbody
- blackbody curve
- blackbody (Planckian) locus
- blacklight lamp
- blackout
- blending lighting
- blinding glare
- Blondel-Rey law
- blue-light hazard
- blue-light hazard function
- board
- bollard
- boomerang (boom)
- borderlight
- borderline between comfort and discomfort (BCD)
- boundary lights
- bowl
- box boom
- bracket (mast arm)
- bridge (light bridge)
- brightness
- brightness contrast threshold
- brightness enhancement
- brightness (of a perceived aperture color)
- brightness ratio
- broad
- Broca-Sulzer effect
- brute
- bulb
- butterfly