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Lighting Glossary

Lighting Terms and Definitions

#

0-10V Dimming 4 way light switch

A

A15 Bulb A19 Bulb a21 bulb Accent Lighting Acrylic and Polycarbonate ADA Compliant Adaptation adaptive lighting Ala Alternating Current (AC)Aluminium Reflector amber light Ambient Light Ambient Light Sensor Ambient Lighting Ambient Temperature American National Standards Institute (ANSI)Ampere anchor light Angstrom Anode Application Specific LED Packaging (ASLP) Arc Tube artificial light Average Rated Life

B

B10 Bulb Backlight Baffle Ballast Ballast Efficacy Factor (BEF)Ballast Factor (Bf)Base Base Down Base Up Bayonet Bayonet Cap Beam Angle Beam Spread Bi-Pin Base bias lighting black light Black Light Blue Blue Light Bollard Light Boob Light BR30 Light Bulb Brightness broad lighting Brushed Finish BUG Rating Bulb Base butterfly lighting

C

C7 Bulb C9 Bulb Can Can Light Candela(cd)candelabra bulb Candle Candle Light Candlepower Candlepower distribution curve Canless Recessed Lighting Canopy Cap Cathode Cave Effect CE Ceiling Cavity Ceiling Light Center Beam Candlepower (CBCP)Certified Ballast Manufacturers Association (CBMA)Chandelier Chips on Board (COB) LED Module Chromaticity Chrome Cap Cie circadian lighting Circline Lamp Circuit Breaker Clearance Light cob light Coefficient of Utilization (CU)Coherent Light Cold Cathode Fluorescent Lamp (CCFL)Color Pumping Color Quality Scale (CQS)Color Rendering Color Rendering Index (CRI)Color Shifting Color Temperature Color Tuning Color Uniformity Compact Fluorescent Lamp (CFL)Cones and Rods Constant-Wattage Autotransformer (CWA)Continuous Dimming Contour Light Cool White Copper Wire Cornice Lighting Correlated Color Temperature (CCT)Cosine Law Cove Lighting Crest Factor Current Current Controlled Dimming Current Crest Factor Custom Rebate Cut Off Angle (of a Luminaire)Cutoff Angle Cutoff Distribution Cutoff Fixture

D

DALI Damp Location Damp Rated Lighting Dark Adaptation dark sky lighting day lighting Daylight Bulb Daylight Harvesting Daylight Lamp Delivered Lumens Desk Lamp Dichroic Die-Cast Diffused Light Diffuser Digital Multiplex (DMX)Dimmable Light Bulb Dimmer Switch डिमिँग Dimming (PWM-Controlled)Diode Direct Current (Dc)Direct Glare Direct Light Direct Lighting Direct-Indirect Directional Lighting Disability Glare Discharge Bulb Discharge Lamp Discomfort Glare Discrete LED Module DLC Listed Dome Light Door Light Double Ended Double Pole Light Switch Downlighting Driver Driver Rating DRL Light Dual Voltage Dusk to Dawn Light

E

e12 bulb E17 Bulb E26 Bulb E26/E27 e27 bulb Economic Life Edge Lit Led Edison Base Edison Bulb Edison Screw Efficacy Efficiency egress lighting Electromagnetic Ballast Electromagnetic Interference Electromagnetic Spectrum Electronic Ballast Electronic Transformer Ellipsoidal Reflector Lamp (Er Lamp)ELV Dimming Emergency Battery Back-Up emergency lighting Enclosed Light Fixture Energy Star enhancing reflections Epact Equivalent Wattage ESCO ETL ETL Listing

F

Fairy Light Far Red Light Fenestration Festoon Lighting Filament Fill Light filtered light Fixture Fixture Efficiency Fixture Lumens Fixture Watts flat lighting Flicker Flood Light Fluorescent Light Fluorescent Tube Flush Mount Light Flux Focused Light Foot-Candle (Fc)Footlambert frequency Frosted Lens Full Spectrum Light Full-cutoff fixture Fully shielded fixture

G

G25 Bulb G40 Bulb g9 bulb General Lighting Ghost Light Glare GLS Group Relamp grow light Gu gu10 bulb

H

H11 Bulb Halogen Lamp Hard Light harmonic Heat Dissipation Heat Lighting Heat Sink Hertz (Hz)hev light HID Bulb HID Lamp High Bay High Pressure Sodium (HPS)High Voltage Lamp High-Bay Lighting High-Efficiency Plasma (HEP)High-Intensity Discharge High-Output (Ho) Lamp House-side Shield Housing

I

IALD IC Rated Light IC Rated Recessed Lighting IEEE IES Files Iesna Illuminance Illumination Incandescence Incandescent Filament Lamp Incandescent Light Indirect Lighting Indoor Positioning Induction Lamp Infrared Radiation (IR)Ingress Protection Ingress Protection (IP) Rating Initial Lumens Instant Start (IS)Insulated Ceiling (IC) Fixture Insulating Layer Integrated LED Light Integrated Lighting Fixture Intensity International Dark-Sky Association (Ida)International Electrotechnical Commission (IEC)Inverse-square law IR Light

J

J-Box JA8 and Title 24 Compliant Joule Junction Box

K

Kelvin Kelvin (K)Kelvin Temperature (K)Key Lighting Keyless Light Fixture Kilowatt (Kw)Kilowatt-Hour (kWh)

L

Lamp Lamp Base Lamp efficiency Lamp Life Lamp Lumen Depreciation (LLD)Lamp Voltage Lampholder Laser Light Layering Light Leading Edge Dimmer Led Array LED Chip LED Conversion (LED Retrofit)LED Driver LED Driver (Fixed Current)LED Driver (Fixed Voltage)LED Light Spectrum LED Module LED Package (High Power)LED Package (Through-the-Hole)Leed Lens Lensed Troffer Level of Illumination light Light Center Length (LCL)Light Color Light Diffuser Light Distribution Light Emitting Diode (LED)Light Loss Factor (LLF)Light Pollution Light Quality Light Reflection Light Scattering लाइट सेंसर Light Source Light Spectra light spectrum light switch Light Transformer Light Trespass Lighting as a Service (LaaS)Lighting Audit Lighting Control Lighting Design Lumens (LDL)Lighting Fixture Lighting Terminology Lightning Protection System (LPS)Linear Lighting LM-70 LM-79 LM-80 Load Wire Long Life Loop Lighting Louver low light Low Voltage Lighting Low Voltage Track Low-Bay Lighting Low-Pressure Sodium (LPS) Lamp Lumen Depreciation Lumen Maintenance Lumens (lm)Lumens per Watt Lumens To Watts Luminaire Luminaire Dirt Depreciation (Ldd)Luminaire Efficiency Luminance Luminance Contrast Luminance Ratio Luminaries Luminous Ceiling Luminous Efficacy Luminous Flux Luminous Intensity Lux

M

Magnetic Ballast Marine Grade matte surface Mean Lumens Medium Base Bulb Medium Light Mercury Vapor Lamp Metal Halide (Mh)Mili-Candela (MCD)Mirror Reflector MOCVD Mogul Base Monochromatic Light Mood Lighting Moon Lighting Motion Sensor Mounting Height Multifaceted Reflector

N

Nanometer (nm)National Institute of Standards and Technology (NIST)natural light Natural White NEMA NEMA Enclosure Type Neon Light Night Light NIR Light Noid Light Nominal Lumens Nominal Watts Non-Shunted Sockets Noon Light Northern Light

O

Oled Opal Glass Opaque Material Open Rated Lamp (Medium Base)Open Rated Lamp (Mogul Base)Operating Position Optical System Ordinances (Municipal)Overhead Lighting

P

PAR PAR Bulb Par Light Par38 Bulb Parallel Circuit Paralouver Passive Infrared Passive Infrared Detection Pcb Pendant Pendant Light Phase-Controlled Dimming Phosphor Phosphor Conversion Photocell photocell light Photometric Photometry Photopic Lumens Planned Lighting Maintenance PN Junction Post Light Potentiometer Power Power Factor (Pf)Power Supply Preheat Prescriptive Rebate Programmed Start Ballast puck light Pull Down Light Fixture Parts Pulse Start Ballast

Q

Quantity of Light

R

R9 Color Rendering Value Radiant Energy Radiation Radio Frequency Interference (RFI)Rapid Start (RS)Rated Lamp Life Rated Life Rebate Recessed Can Recessed Light Recessed Lighting Reference Ballast Reflectance Reflected Glare Reflection Reflective Lamp Shade Reflector Refraction Refractor Restrike Time Retrofit RGB Light Rim Light Ring Light Rohs Compliance Room Utilization Factor

S

Saturation Scotopic Lumens Self-Ballasted Lamp Semi Flush Semi Flush Mount Lighting Semi-cutoff fixture Series circuit Shade Shielding shroud Shunted Sockets Silica Silicate Silicones Single Ended Single Pole Light Switch smart light bulb Smart Light Switch Smart Lighting Snap Switch Socket Soft Light Solid State Solid State Lighting Spectral Power Distribution (SPD)Specular Reflection specular surface Spotlight Step Dimming Strain Relief Stray light Striking Strip Light supplementary lighting Swing Arm Lamp Switched-Mode Power Supply (SMPS)

T

t10 bulb T12 Bulb T5 Bulb T5 Light t8 fluorescent bulb Task Lighting Tea Light Candle three point lighting three way bulb Three Way Light Switch Time Clock Timers TM-21 Torchiere Total Cost Of Ownership (TCO)Track Lighting Translucent Material Transmission transmittance Transparent Material Tri-Dimming Triac Dimming Troffer Tube Lighting Tungsten Halogen tungsten light Turtle Friendly Lighting Twin Tube Type A Bulb type b bulb Type C Bulb Type G Bulb type t bulb

U

U-Bend Lamp UL Label UL Listing Ultrasonic Sensor Ultraviolet Light Under Cabinet Lighting Underwriters Laboratories (UL)Uniformity Uplighting UV Light UVA Light UVB Light UVC Light

V

Valance Lighting Vandal-Resistant Fixture Vanity Light Vapor-Tight Fixture Veiling Luminance veiling reflections vintage light bulb Visibility Visible Light Visible Light Spectrum Visual Comfort Probability (VCP)visual field Visual Task Vlogging Light Volumetric Troffer VSC Light

W

WAC Lighting Wafer Light wake up light Wall Grazing Wall Pack Light Wall Sconce Wall Wash Lighting Wall Washer Light Wallpack Warm Light Warm White Warm-Up Time Watts To Lumens Wavelength Weatherproof Work Plane

X

Z

Zenith Zodiacal Light

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