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Glossary of Terms
Glossary of Terms

Glossary of Terms

Listed below are lighting terms and definitions for your reference. To navigate, click on the first letter in the word you wish to research.
Show terms starting with  →   0-9 | A | B | C | D | E | F | G | H | I | L | M | N | P | R | S | W |

1156 Bulb

12VDC, S.C. bayonet base incandescent bulb used in loading dock signal fixtures

120MB

120VAC, Ba9 S.C. bayonet base incandescent bulb used in control panel indicators

15-T6

15-watt, candelabra or D.C. bayonet base incandescent tube lamp for exit signs

25-T6-1/2

25-watt, candelabra or D.C. bayonet base incandescent tube lamp for exit signs

3S6

3-watt, 120VAC, candelabra base incandescent bulb used in control panel indicators

6S6

6-watt, 120VAC, candelabra, intermediate or D.C. bayonet based incandescent bulb

A-19

An incandescent bulb measuring 2.375 inch diameter

Accent lamps

An LED or incandescent lamp for accent lighting applications

Acorn post top lamp

​Acorn globe on lamp post

Adapter

Screw-on base to convert one size lamp base to another base size

Amber LED retrofit lamp

Amber Led lamp replacement for incandescent bulbs in night light and step light fixtures

B10

1.25 inch diameter incandescent bulb used in decorative and chandelier lighting applications

Ba9

9mm single contact bayonet base

Bank drive through traffic signal

Traffic signal fixture for drive through bank teller lanes

Bank lane signal

Red and green LED signal fixture for bank lane traffic control

Beacon lamp

LED lamp for retrofitting industrial signal fixtures

Bollard

Typically a cylindrical light fixture 3’- 4’ tall mounted perpendicular to the ground, providing exterior perimeter and walkway security lighting.

C-7

An incandescent lamp measuring .875 inch diameter

Candelpower

A measure of intensity of lamps that project light

Chicago Style Exit Sign

An exit sign with red or green letters applied to a translucent or opaque background

Control panel indicators

Miniature light indicators on process control panels found in industrial facilities, utilties and hospitals

Convenience lighting fixture

A recessed light box in a wall designed to project light for illuminating designated floor space

D.C. bayonet base

A locking screw base with two contacts, measures approximately .5625 inches in diameter

Décor lamps

Lamps used in decorative lighting applications

Diffusers

Red or green lenses for stencil face exit signs

Dock signal

Signal fixture used for the communication of safe loading and unloading activities of trucks at warehouse facilities

E12

Candelabra screw base measuring approximately .375 inches in diameter

E17

Intermediate screw base measuring approximately .625 inches in diameter

E26

Medium screw base (US) measuring approximately 1 inch in diameter

Elevator lamp

PAR16 lamp used in elevator car ceiling light fixtures

Emergency call box key pad lamp

LED lamp for key pad illumination on emergency call box communication towers

Exit sign

A lighting fixture marking egress from a building

Exit sign lamp

Lamp used to illuminate an exit sign

Exit sign retrofit kit

A kit containing 2 LED lamps and 4 base adapters for retrofitting exit signs

Fluorescent lamp

A lamp in which electric discharge of ultraviolet energy excites a fluorescing phosphor coating and transforms some of that energy to visible light

G16

2 inch diameter round globe decorative lamp

G23 CFL Base

A 2-pin lamp base found on 5,7 or 9 watt compact plug-in fluorescent lamps.

G24U CFL Base

A 4-pin universal lamp base designed to retrofit GX23, G24q-1, G24q-2, and G24q-3, 4-pin compact plug-in fluorescent lamps.

Green LED exit retrofit lamp

Green LED lamp replacement for incandescent exit sign bulbs

Green letter non-stencil exit sign

An exit sign with green letters applied to a translucent or opaque background

Green stencil faced exit sign

An exit sign with stenciled letters EXIT and having a green lens

GX23-2 CFL Base

A 2-pin lamp base found on 13-watt compact plug-in fluorescent lamps.

GX23-4 CFL Base

A 4-pin lamp base found on 13-watt compact plug-in fluorescent lamps.

Hardwire adapter

A device to retrofit an exit sign without sockets; includes two lamp holders for direct wiring to incoming line voltage

Health care LED night light retrofit lamp

LED lamp replacement for incandescent bulbs found in hospital and nursing home room night light fixtures

Hospital night light lamp

LED lamp for patient room night light fixtures

Incandescent lamp

A lamp that provides light when a filament is heated to incandescence by an electric current

Industrial signal fixture

Vapor proof or explosion proof signal fixtures used in manufacturing facilities

Lamp

The technical word meaing light bulb or tube; the device that provides light in a fixture

LED

Light emitting diode

LED bank lane retrofit lamp

LED lamp replacement for incandescent bulbs used in bank lane signal fixtures

LED décor retrofit lamps

LED lamp replacement for incandescent bulbs used in decorative lighting applications

LED exit retrofit kit

LED lamps and base adapters for replacing incandescent lamps in exit signs

LED Exit retrofit lamp

LED replacement lamp for incandescent bulbs in exit signs

LED industrial beacon retrofit lamp

LED lamp replacement for incandescent bulbs in vapor proof and explosion proof signal fixtures

LED lamp

A lamp that provides light when light emitting diodes are energized by an electric current

LED loading dock signal

Red and green LED signal fixture for loading dock traffic control

LED loading dock signal retrofit lamp

LED lamp replacement for incandescent bulbs used in loading dock signals

LED MR16

12VDC LED lamp for accent and decorative lighting

LED panel indicator lamps

LED lamp replacement for incandescent bulbs used as control panel indicators

LED PAR16

2 inch diameter LED lamp used in directional, recessed can lights, decorative and elevator car ceiling light applications

LED PAR20

2.5 inch diameter LED lamp used in directional, recessed can lights, and decorative lighting applications

LED PAR38

4.75 inch diameter LED lamp used in can lights and flood light applications

LED PL based exit lamp

Compact PL5,7,9 (G23) based LED lamp replacement for fluorescent exit signs

LED Post Top Lamp for Acorn Fixtures

​LED lamp replaces 150-watt metal halide bulb in acorn lamp posts

LED retrofit

The conversion of an incandescent exit sign to LED technology

LED step light retrofit lamp

LED lamp replacement for incandescent bulbs found in step light fixtures

Light

The term applied to a visible energy from a source and is usually measured in lumens or candelpower

Loading dock communication signal

Red and green signal fixture for loading dock traffic control

Lumen

The basic measurement of light

MR16

Low voltage metal reflector lamp measuring 2 inches in diameter

Nursing home night light lamp

LED lamp for nursing home patient room night light fixtures

Panel lamp

Incandescent or LED lamp for control panel indicators

PAR lamp

Parabolic aluminized reflector lamp typically used in recessed can lights, decorative and flood light applications

PL-G23

A 2 pin plug in base found on 5-watt, 7-watt and 9-watt compact fluorescent lamps

PL G24q-1

​A 4-pin plug in base found on 18-watt and 26-watt compact fluorescent lamps

PL G24q-2

​A 4-pin plug in base found on 18-watt and 26-watt compact fluorescent lamps

PL G24q-3

​A 4-pin plug in base found on 18-watt and 26-watt compact fluorescent lamps

PL GX23

A 2-pin plug in base found on 13-watt compact fluorescent lamps

PL GX24q-2

​A 4-pin plug in base found on 32-watt and 42-watt compact fluorescent lamps

PL GX24q-3

​A 4-pin plug in base found on 32-watt and 42-watt compact fluorescent lamps

PL GX24q-4

​A 4-pin plug in base found on a 32-watt and 42-watt compact fluorescent lamps

Recessed Can Fixture

Typically 6”, 8” or 10” in diameter open-faced cans recessed in ceilings of commercial buildings which provide down lighting for hallways and office space.

Red LED exit retrofit lamp

Red LED lamp replacement for incandescent exit sign bulbs

Red letter non-stencil exit sign

An exit sign with red letters applied to a translucent or opaque background

Red stencil faced exit sign

An exit sign with stenciled letters EXIT, with a red lens

Replacement lenses

Red or green lenses to replace existing fiberglass exit sign lenses

S11

Medium, candelabra or intermediate base incandescent bulb for signage and decorative lighting applications

S14

Medium, candelabra or intermediate base incandescent bulb for signage and decorative lighting applications

Security detention night light lamp

Lamp for night light applications in security detention light fixtures

Step light fixture

A recessed light box in a wall designed to illuminate stairs

Wall Pack

A fixture mounted on industrial and commercial exterior walls to provide perimeter, security lighting.

Watt

Unit used to measure power consumption

White LED exit retrofit lamp

White LED lamp replacement for incandescent exit sign bulbs in Chicago style signs