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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- floor pocket
- floren
- fluorescence
- fluorescent lamp
- flush mounted or recessed
- flux transfer theory
- fog (adverse weather) lamps
- follow spot (light)
- footcandle
- footcandle meter
- footlambert
- footlights
- form factor, f1→2
- formation light
- forward ray tracing
- fovea
- foveal vision
- Fresnel spotlight
- fringe light
- front lighting
- front of house (FOH) intercept panel
- front of house (FOH) spots
- funnel
- fuselage lights
- gamut area index (GAI)
- gamut area (of a light source)
- Gamut Index (Rg)
- gamut shift pattern
- gas-filled lamp
- gaseous discharge
- gel
- general color rendering index
- general diffuse lighting
- general illumination (television, film, theater)
- general lighting
- general lighting source lamp (GLS)
- general purpose floodlight, GP
- germicidal action spectrum
- germicidal dose
- germicidal effectiveness
- germicidal flux
- germicidal flux density
- germicidal functions
- germicidal radiation
- ghost (or ghost load)
- glare
- global solar radiation
- globe (for light control)
- globe (theater lighting equipment)
- glossometer
- glow discharge
- glow factor
- glow lamp
- gobo
- goniophotometer
- graybody
- grid (or gridiron)
- grip
- grip gear
- ground-area open floodlight, O
- ground-area open floodlight with reflector insert, OI
- ground light
- ground row
- group control
- group flashing light
- half scrim
- halo light
- halogen infrared (HIR)
- hand hole
- handheld remote
- hard cyc
- hard light
- hazard or obstruction beacon (aeronautical lighting)
- hazardous location
- headlamp
- headlight
- heat extraction thermal factor
- heavy duty floodlight, HD
- heliotherapy
- Helmholtz-Kohlraush Effect
- hemispherical-conical reflectance
- hemispherical-conical transmittance
- hemispherical-directional reflectance
- hemispherical-directional transmittance
- hemispherical reflectance*
- hemispherical transmittance*
- high-bay lighting
- high hat
- high intensity discharge (HID) lamp
- high-key lighting
- high-mast lighting
- high pressure sodium (HPS) lamp
- horizontal exit
- horizontal plane of a searchlight
- hot-cathode lamp
- house lights
- HSL color space
- HSV color space
- hue-angle bin
- hue angle (h)