18W Light Bulbs | McMaster-Carr

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19 Products

About Brightness

About Light Appearance

About Replacing Tubular Fluorescent Light Bulbs

Spiral

Medium (Standard Household)

Use these bulbs in standard sockets, panels, and appliances. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Bulbs with a warm light appearance have yellow tones. Bulbs with a neutral light appearance are commonly used in workspaces. Bulbs with a cool light appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly energy cost is based on 3 hours of usage per day at $0.11 per kWh.

CFL (compact fluorescent) bulbs are more energy efficient and last longer than halogen bulbs. It takes several seconds for them to reach full brightness. They contain small amounts of mercury (for disposal information, visit www.epa.gov/cfl).

Silicone-coated glass and plastic-coated glass bulbs are shatter-resistant; the coating retains glass shards if they do break.

Bulbs that cannot be sold to the listed regions do not meet energy efficiency and/or mercury regulations.

Spiral Bulb—Medium (Standard Household) Base (1 1/16" Dia.)
Equiv. Incand. Bulb Wattage	Light Appearance	Brightness, lumens	Light Technology	Light Setting	Bulb Material	Color	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Cannot Be Sold To	Pkg. Qty.		Pkg.
120V
75W	Warm (2,700K)	1,200	CFL	Not Dimmable	Plastic-Coated Glass	Frosted	18W	10,000	2.17	Canada	1	0000000	000000
75W	Warm (2,700K)	1,200	CFL	Not Dimmable	Plastic-Coated Glass	Frosted	18W	10,000	2.17	Canada	12	0000000	000000

Twist-and-Lock Base Light Bulbs

Standard

Standard Bulb—GU24 Base
Equiv. Incand. Bulb Wattage	Light Appearance	Brightness, lumens	Light Technology	Light Setting	Bulb Shape No.	Bulb Material	Color	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Bulb Dia.	O'all Lg.	Pkg. Qty.		Pkg.
120V
100W	Neutral (4,000K)	1,600	LED	Dimmable	A21	Plastic	Frosted	18W	25,000	2.17	2 5/8"	5 7/16"	1	0000000	000000

Recessed Double-Contact Base Tubular Light Bulbs

T8 and T8/HO

Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Color rendering index (CRI) is a measurement on a scale of 0-100 of how accurately the light from a bulb represents an object's true colors; the higher the number, the more natural the colors appear. Any CRI value over 80 will show colors true to life. Bulbs with a warm light appearance have yellow tones. Bulbs with a neutral light appearance are often used in workspaces. Bulbs with a cool light appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh.

LED bulbs last longer and are more efficient than fluorescent bulbs. They generate little heat and withstand vibration. To install, bypass the ballast by wiring the socket directly to the power source. Plastic-coated glass bulbs are shatter resistant; the coating retains glass shards if they break.

T8 Bulb (1" Dia.)
O'all Lg.	Equiv. Fluorescent Bulb Wattage	Light Appearance	Brightness, lumens	CRI	Light Setting	Bulb Material	Light Technology	LED Installation Type	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Pkg. Qty.		Pkg.
48"	32W	Cool (4,000K)	2,300	83	Not Dimmable	Plastic-Coated Glass	LED	Ballast Bypass	18W	50,000	2.17	10	0000000	0000000

LED Light Bulbs for High-Intensity Discharge (HID) Lights

Tubular Bulb with E26 or EX39 Base

Medium (Standard Household)

Mogul

Replace high-intensity discharge (HID) lights with the longer-lasting, energy-efficient LEDs. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. LED lights are perceived as brighter at night than high-intensity discharge light technologies, so they require fewer lumens to provide the same brightness. Match your old light’s wattage to find the right LED bulb. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh.

Ballast bypass bulbs eliminate the need for a ballast, so the socket must be wired directly to the power source.

Equiv. Bulb Wattage
Metal Halide	High-Pressure Sodium	Mercury Vapor	Light Appearance	Brightness, lumens	Operating Position	Bulb Dia.	O'all Lg.	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Specifications Met		Each
Ballast Bypass
Tubular Bulb—E26 Medium (Standard Household) Base
70W	70W	70W	Neutral (4,000K)	2,600	Base Up, Base Down, Horizontal	2 1/2"	5 11/16"	18W	50,000	2.17	UL Listed, C-UL Listed	00000000	000000
70W	70W	70W	Warm (3,000K)	2,400	Base Up, Base Down, Horizontal	2 1/2"	5 11/16"	18W	50,000	2.17	UL Listed, C-UL Listed	00000000	00000
100W	100W	100W	Cool (5,000K) Neutral (4,000K) Warm (3,000K)	2,450 2,560 2,610	Base Up, Base Down, Horizontal	2 5/8"	6 3/8"	18W	50,000	2.17	UL Listed, C-UL Listed	00000000	00000
Tubular Bulb—EX39 Mogul Base
70W/100W/150W	70W/100W/150W	70W/100W/150W	Cool (5,000K) Neutral (4,000K) Warm (3,000K)	3,170 3,333 3,360	Base Up, Base Down, Horizontal	3"	7"	12W, 18W, 24W	50,000	2.89	UL Listed, C-UL Listed	0000000	00000

Terminal Base Sealed-Beam Vehicle Headlamp Light Bulbs

Screw-On Terminal Base

Top View

The sealed assembly withstands the rigors of outdoor use. In addition to using these bulbs in vehicles, they can be used for spot, flood, and emergency lighting. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.

Screw-On Terminal Base
Trade No.	Voltage	Wattage	Light Appearance	Brightness, lumens	Light Technology	Light Setting	Bulb Material	Color	Rated Life, hrs.	Bulb Dia.	O'all Lg.		Each
PAR36 Bulb
4014	6.4V	18W	Warm (3,000K)	Not Rated	Incand.	Not Dimmable	Glass	Clear	200	4 1/2"	2 3/4"	0000000	000000

Four-Pin Wedge Base Plug-In Compact Light Bulbs

Often used in task lights, these bulbs are comparable to PL, Dulux, and Biax bulbs. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Bulbs with a warm light appearance have yellow tones. Bulbs with a neutral light appearance are often used in workspaces. Bulbs with a cool light appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh.

CFL (compact fluorescent) bulbs are energy efficient, but take several seconds to reach full brightness. They cannot be sold to Canada because they do not meet local efficiency standards and exceed local regulatory limits on mercury (for disposal information, visit www.epa.gov/cfl).

G24q-2 Base

Horizontal, Base Up, Base Down Operating Position
Equiv. Fluorescent Bulb Wattage	Light Appearance	Brightness, lumens	Light Setting	Light Technology	Bulb Material	O'all Lg.	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Pkg. Qty.	Cannot Be Sold To		Pkg.
18W	Warm (2,700K)	1,250	Dimmable	CFL	Glass	5 11/16"	18W	12,000	2.17	1	Canada	0000000	000000
18W	Neutral (3,500K)	1,250	Dimmable	CFL	Glass	5 11/16"	18W	12,000	2.17	1	Canada	0000000	00000
18W	Cool (4,100K)	1,250	Dimmable	CFL	Glass	5 11/16"	18W	12,000	2.17	1	Canada	0000000	00000

Two-Pin Wedge Base Plug-In Compact Light Bulbs

G24d-2 Base

Horizontal, Base Up, Base Down Operating Position
Equiv. Fluorescent Bulb Wattage	Light Appearance	Brightness, lumens	Light Technology	Light Setting	Bulb Material	O'all Lg.	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Cannot Be Sold To		Each
18W	Warm (2,700K)	1,250	CFL	Not Dimmable	Glass	6"	18W	10,000	2.17	Canada	0000000	000000
18W	Neutral (3,500K)	1,250	CFL	Not Dimmable	Glass	6"	18W	10,000	2.17	Canada	0000000	00000
18W	Cool (4,100K)	1,250	CFL	Not Dimmable	Glass	6"	18W	10,000	2.17	Canada	0000000	00000

Four-Pin Base Plug-In Compact Light Bulbs

2G11 Base

Energy efficient and long lasting, these bulbs are often used in task lights. They’re comparable to PL, Dulux, and Biax bulbs. It takes these bulbs several seconds to reach full brightness. Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Bulbs with a warm light appearance have yellow tones. Bulbs with a neutral light appearance are often used in workspaces. Bulbs with a cool light appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh. These bulbs cannot be sold to Canada because they do not meet local efficiency standards and exceed local regulatory limits on mercury (for disposal information, visit www.epa.gov/cfl).

2G11 Base
Equiv. Fluorescent Bulb Wattage	Light Appearance	Brightness, lumens	Operating Position	Light Setting	Light Technology	Bulb Material	O'all Lg.	Wattage	Rated Life, hrs.	Est. Yearly Energy Cost, $	Cannot Be Sold To		Each
18W	Warm (3,000K)	1,250	Horizontal, Base Up, Base Down	Dimmable	CFL	Glass	8 15/16"	18W	15,000	2.17	Canada	0000000	000000
18W	Neutral (3,500K)	1,250	Horizontal, Base Up, Base Down	Dimmable	CFL	Glass	8 15/16"	18W	15,000	2.17	Canada	0000000	00000
18W	Cool (4,100K)	1,250	Horizontal, Base Up, Base Down	Dimmable	CFL	Glass	8 15/16"	18W	15,000	2.17	Canada	0000000	00000

Recessed Can Lights

Create recessed can lights by pairing a housing with a light. These lights fit into ceiling cutouts to provide directed, ambient lighting so they’re often used in indoor spaces such as offices and lobbies, or for decorative lighting. Rated for use in damp locations, these lights withstand humidity and moisture.

Lights have built-in LEDs, which last longer, are more efficient, and generate less heat than other technologies. Clips on the sides hold the light in a housing.

Smooth-reflector lights focus light down.

Lights with a hardwire connection have two switches for adjusting their brightness and light appearance.

Warm light highlights yellow tones similarly to incandescent bulbs. Neutral light is often used in offices and retail stores. Cool light is best for performing detailed tasks and inspections.

For technical drawings and 3-D models, click on a part number.

Lights with Hardwire Connection—Built-In LED Bulbs

With Hardwire Connection and Smooth Reflector

	Overall
For Housing ID	Dia.	Ht.	Equiv. CFL Bulb Wattage	Voltage	Brightness, lumens	Light Appearance	Light Setting	Wattage	Features	Specifications Met		Each
Smooth Reflector
6"	7 3/8"	4 3/8"	23W, 32W	120V AC, 277V AC	1,200, 1,500	Warm (3,000K) Neutral (3,500K) Cool (4,000K)	2 Way, Dimmable	15W, 18W	Adjustable Light Appearance	C-ETL Listed, ETL Listed	000000	000000