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Lighting Glossary

Lighting Terms and Definitions

#

0-10V Dimming4 way light switch

A

A15 BulbA19 Bulba21 bulbAccent LightingAcrylic and PolycarbonateADA CompliantAdaptationadaptive lightingAlaAlternating Current (AC)Aluminium Reflectoramber lightAmbient LightAmbient Light SensorAmbient LightingAmbient TemperatureAmerican National Standards Institute (ANSI)Ampereanchor lightAngstromAnodeApplication Specific LED Packaging (ASLP) Arc Tubeartificial lightAverage Rated Life

B

B10 BulbBacklightBaffleBallastBallast Efficacy Factor (BEF)Ballast Factor (Bf)BaseBase DownBase UpBayonetBayonet CapBeam AngleBeam SpreadBi-Pin Basebias lightingblack lightBlack Light BlueBlue LightBollard LightBoob LightBR30 Light BulbBrightnessbroad lightingBrushed FinishBUG RatingBulb Basebutterfly lighting

C

C7 BulbC9 BulbCanCan LightCandela(cd)candelabra bulbCandleCandle LightCandlepowerCandlepower distribution curveCanless Recessed LightingCanopyCapCathodeCave EffectCECeiling CavityCeiling LightCenter Beam Candlepower (CBCP)Certified Ballast Manufacturers Association (CBMA)ChandelierChips on Board (COB) LED ModuleChromaticityChrome CapCiecircadian lightingCircline LampCircuit BreakerClearance Lightcob lightCoefficient of Utilization (CU)Coherent LightCold Cathode Fluorescent Lamp (CCFL)Color PumpingColor Quality Scale (CQS)Color RenderingColor Rendering Index (CRI)Color ShiftingColor TemperatureColor TuningColor UniformityCompact Fluorescent Lamp (CFL)Cones and RodsConstant-Wattage Autotransformer (CWA)Continuous DimmingContour LightCool WhiteCopper WireCornice LightingCorrelated Color Temperature (CCT)Cosine LawCove LightingCrest FactorCurrentCurrent Controlled DimmingCurrent Crest FactorCustom RebateCut Off Angle (of a Luminaire)Cutoff AngleCutoff DistributionCutoff Fixture

D

DALIDamp LocationDamp Rated LightingDark Adaptationdark sky lightingday lightingDaylight BulbDaylight HarvestingDaylight LampDelivered LumensDesk LampDichroicDie-CastDiffused LightDiffuserDigital Multiplex (DMX)Dimmable Light BulbDimmer SwitchDimmingDimming (PWM-Controlled)DiodeDirect Current (Dc)Direct GlareDirect LightDirect LightingDirect-IndirectDirectional LightingDisability GlareDischarge BulbDischarge LampDiscomfort GlareDiscrete LED ModuleDLC ListedDome LightDoor LightDouble EndedDouble Pole Light SwitchDownlightingDriverDriver RatingDRL LightDual VoltageDusk to Dawn Light

E

e12 bulbE17 BulbE26 BulbE26/E27e27 bulbEconomic LifeEdge Lit LedEdison BaseEdison BulbEdison ScrewEfficacyEfficiencyegress lightingElectromagnetic BallastElectromagnetic InterferenceElectromagnetic SpectrumElectronic BallastElectronic TransformerEllipsoidal Reflector Lamp (Er Lamp)ELV DimmingEmergency Battery Back-Upemergency lightingEnclosed Light FixtureEnergy Starenhancing reflectionsEpactEquivalent WattageESCOETLETL Listing

F

Fairy LightFar Red LightFenestrationFestoon LightingFilamentFill Lightfiltered lightFixtureFixture EfficiencyFixture LumensFixture Wattsflat lightingFlickerFlood LightFluorescent LightFluorescent TubeFlush Mount LightFluxFocused LightFoot-Candle (Fc)FootlambertfrequencyFrosted LensFull Spectrum LightFull-cutoff fixtureFully shielded fixture

G

G25 BulbG40 Bulbg9 bulbGeneral LightingGhost LightGlareGLSGroup Relampgrow lightGugu10 bulb

H

H11 BulbHalogen LampHard LightharmonicHeat DissipationHeat LightingHeat SinkHertz (Hz)hev lightHID BulbHID LampHigh BayHigh Pressure Sodium (HPS)High Voltage LampHigh-Bay LightingHigh-Efficiency Plasma (HEP)High-Intensity DischargeHigh-Output (Ho) LampHouse-side ShieldHousing

I

IALDIC Rated LightIC Rated Recessed LightingIEEEIES FilesIesnaIlluminanceIlluminationIncandescenceIncandescent Filament LampIncandescent LightIndirect LightingIndoor PositioningInduction LampInfrared Radiation (IR)Ingress ProtectionIngress Protection (IP) RatingInitial LumensInstant Start (IS)Insulated Ceiling (IC) FixtureInsulating LayerIntegrated LED LightIntegrated Lighting FixtureIntensityInternational Dark-Sky Association (Ida)International Electrotechnical Commission (IEC)Inverse-square lawIR Light

J

J-BoxJA8 and Title 24 CompliantJouleJunction Box

K

KelvinKelvin (K)Kelvin Temperature (K)Key LightingKeyless Light FixtureKilowatt (Kw)Kilowatt-Hour (kWh)

L

LampLamp BaseLamp efficiencyLamp LifeLamp Lumen Depreciation (LLD)Lamp VoltageLampholderLaser LightLayering LightLeading Edge DimmerLed ArrayLED ChipLED Conversion (LED Retrofit)LED DriverLED Driver (Fixed Current)LED Driver (Fixed Voltage)LED Light SpectrumLED ModuleLED Package (High Power)LED Package (Through-the-Hole)LeedLensLensed TrofferLevel of IlluminationlightLight Center Length (LCL)Light ColorLight DiffuserLight DistributionLight Emitting Diode (LED)Light Loss Factor (LLF)Light PollutionLight QualityLight ReflectionLight ScatteringLight SensorLight SourceLight Spectralight spectrumlight switchLight TransformerLight TrespassLighting as a Service (LaaS)Lighting AuditLighting ControlLighting Design Lumens (LDL)Lighting FixtureLighting TerminologyLightning Protection System (LPS)Linear LightingLM-70LM-79LM-80Load WireLong LifeLoop LightingLouverlow lightLow Voltage LightingLow Voltage TrackLow-Bay LightingLow-Pressure Sodium (LPS) LampLumen DepreciationLumen MaintenanceLumens (lm)Lumens per WattLumens To WattsLuminaireLuminaire Dirt Depreciation (Ldd)Luminaire EfficiencyLuminanceLuminance ContrastLuminance RatioLuminariesLuminous CeilingLuminous EfficacyLuminous FluxLuminous IntensityLux

M

Magnetic BallastMarine Gradematte surfaceMean LumensMedium Base BulbMedium LightMercury Vapor LampMetal Halide (Mh)Mili-Candela (MCD)Mirror ReflectorMOCVDMogul BaseMonochromatic LightMood LightingMoon LightingMotion SensorMounting HeightMultifaceted Reflector

N

Nanometer (nm)National Institute of Standards and Technology (NIST)natural lightNatural WhiteNEMANEMA Enclosure TypeNeon LightNight LightNIR LightNoid LightNominal LumensNominal WattsNon-Shunted SocketsNoon LightNorthern Light

O

OledOpal GlassOpaque MaterialOpen Rated Lamp (Medium Base)Open Rated Lamp (Mogul Base)Operating PositionOptical SystemOrdinances (Municipal)Overhead Lighting

P

PARPAR BulbPar LightPar38 BulbParallel CircuitParalouverPassive InfraredPassive Infrared DetectionPcbPendantPendant LightPhase-Controlled DimmingPhosphorPhosphor ConversionPhotocellphotocell lightPhotometricPhotometryPhotopic LumensPlanned Lighting MaintenancePN JunctionPost LightPotentiometerPowerPower Factor (Pf)Power SupplyPreheatPrescriptive RebateProgrammed Start Ballastpuck lightPull Down Light Fixture PartsPulse Start Ballast

Q

Quantity of Light

R

R9 Color Rendering ValueRadiant EnergyRadiationRadio Frequency Interference (RFI)Rapid Start (RS)Rated Lamp LifeRated LifeRebateRecessed CanRecessed LightRecessed LightingReference BallastReflectanceReflected GlareReflectionReflective Lamp ShadeReflectorRefractionRefractorRestrike TimeRetrofitRGB LightRim LightRing LightRohs ComplianceRoom Utilization Factor

S

SaturationScotopic LumensSelf-Ballasted LampSemi FlushSemi Flush Mount LightingSemi-cutoff fixtureSeries circuitShadeShieldingshroudShunted SocketsSilicaSilicateSiliconesSingle EndedSingle Pole Light Switchsmart light bulbSmart Light SwitchSmart LightingSnap SwitchSocketSoft LightSolid StateSolid State LightingSpectral Power Distribution (SPD)Specular Reflectionspecular surfaceSpotlightStep DimmingStrain ReliefStray lightStrikingStrip Lightsupplementary lightingSwing Arm LampSwitched-Mode Power Supply (SMPS)

T

t10 bulbT12 BulbT5 BulbT5 Lightt8 fluorescent bulbTask LightingTea Light Candlethree point lightingthree way bulbThree Way Light SwitchTime ClockTimersTM-21TorchiereTotal Cost Of Ownership (TCO)Track LightingTranslucent MaterialTransmissiontransmittanceTransparent MaterialTri-DimmingTriac DimmingTrofferTube LightingTungsten Halogentungsten lightTurtle Friendly LightingTwin TubeType A Bulbtype b bulbType C BulbType G Bulbtype t bulb

U

U-Bend LampUL LabelUL ListingUltrasonic SensorUltraviolet LightUnder Cabinet LightingUnderwriters Laboratories (UL)UniformityUplightingUV LightUVA LightUVB LightUVC Light

V

Valance LightingVandal-Resistant FixtureVanity LightVapor-Tight FixtureVeiling Luminanceveiling reflectionsvintage light bulbVisibilityVisible LightVisible Light SpectrumVisual Comfort Probability (VCP)visual fieldVisual TaskVlogging LightVolumetric TrofferVSC Light

W

WAC LightingWafer Lightwake up lightWall GrazingWall Pack LightWall SconceWall Wash LightingWall Washer LightWallpackWarm LightWarm WhiteWarm-Up TimeWatts To LumensWavelengthWeatherproofWork Plane

X

xenon light

Z

ZenithZodiacal Light
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