3W Light Bulbs | McMaster-Carr

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17 Products

About Brightness and Light Appearance

Find the right lumen level to brighten your space. Then, compare the way warm, neutral, and cool lighting affect the appearance of everyday objects.

Bayonet Base Miniature Light Bulbs

Single-Contact Base with Flat Top Bulb

Single-Contact Base with Tapered Bulb

Miniature

Small

Pins on either side of the base lock these bulbs into sockets. These bulbs are sized to fit tight spaces such as indicators and vehicle lights. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.

Incandescent bulbs are traditional light bulbs.

Single Contact—Miniature Base (0.36" Base Dia.)
Bulb Trade Number	Voltage	Wattage	Current	Light Technology	Rated Life, hrs.	Bulb Dia.	O'all Lg.	Color	Pkg. Qty.		Pkg.
Flat Top Bulb
60MB	60V AC/60V DC	3W	0.05A	Incand.	Not Rated	0.31"	1.19"	Clear	5	1505K256	000000
120MB	120V AC/120V DC	3W	0.03A	Incand.	Not Rated	0.31"	1.19"	Clear	5	1505K95	0000
Single Contact—Small Base (0.59" Base Dia.)
Tapered Bulb
1651	5V AC/5V DC	3W	0.6A	Incand.	Not Rated	1"	2"	Clear	10	1505K113	00000

Wedge Base Miniature Light Bulbs

Tubular

Medium

These bulbs are sized to fit tight spaces such as indicators and vehicle lights. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.

Incandescent bulbs are traditional light bulbs.

Tubular Bulb—Medium Base (0.37" Dia.)
Bulb Trade Number	Voltage	Wattage	Brightness, lumens	Current	Light Technology	Bulb Material	Color	Rated Life, hrs.	Bulb Dia.	O'all Lg.	Bulb Shape No.	Pkg. Qty.		Pkg.
147	7V DC	3W	25	0.43A	Incand.	Glass	Clear	Not Rated	0.41"	1.06"	T3 1/4	10	1505K378	00000
2821	12V DC	3W	22	0.25A	Incand.	Glass	Clear	Not Rated	0.41"	1.06"	T3 1/4	10	9527T197	0000

Bi-Pin Base Miniature Light Bulbs

These bulbs are small, but very bright, so they're often used in flashlights and optical instruments such as projectors and microscopes. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.

LED bulbs last longer and are more efficient than other technologies. They generate little heat and withstand vibration.

	Voltage	Wattage	Brightness, lumens	Current	Light Technology	Bulb Material	Color	Rated Life, hrs.	Bulb Dia.	O'all Lg.	Bulb Shape No.	Pkg. Qty.		Pkg.
A	12V AC/12V DC	3W	300	0.25A	LED	Plastic	Clear	25,000	5/8"	1.57"	T5	1	1535K942	00000

Slide Base Miniature Light Bulbs

Incandescent

These bulbs are sized to fit older telephone switchboards, signs, instruments, and indicators. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.

Incandescent bulbs are traditional light bulbs.

Flat Top Bulb (0.28" Base Dia.)
Bulb Trade Number	Voltage	Wattage	Current	Light Technology	Rated Life, hrs.	Bulb Dia.	O'all Lg.	Color	Pkg. Qty.		Pkg.
60PSB	60V AC/60V DC	3W	0.05A	Incand.	Not Rated	1/4"	1.1"	Clear	5	1505K231	000000
120PSB	120V AC	3W	0.03A	Incand.	Not Rated	1/4"	1.1"	Clear	10	1505K571	00000

Festoon Base Miniature Light Bulbs

These bulbs are sized to fit tight spaces such as signs, instruments, indicators, and vehicle lights. Brightness is measured in lumens; the higher the lumens, the brighter the bulb.

Tubular Bulb—0.33" Base Dia.
Bulb Trade Number	Voltage	Wattage	Brightness, lumens	Current	Light Technology	Bulb Material	Color	Rated Life	Bulb Dia.	O'all Lg.	Bulb Shape No.	Pkg. Qty.		Pkg.
3021	12V AC/12V DC	3W	25	0.25A	Incand.	Glass	Clear	Not Rated	0.28"	1.14"	T2 1/4	10	9527T152	00000
3021A	12V AC/12V DC	3W	25	0.25A	Incand.	Glass	Amber	Not Rated	0.28"	1.14"	T2 1/4	10	9527T153	0000
3021B	12V AC/12V DC	3W	25	0.25A	Incand.	Glass	Blue	Not Rated	0.28"	1.14"	T2 1/4	10	9527T154	0000
3021G	12V AC/12V DC	3W	25	0.25A	Incand.	Glass	Green	Not Rated	0.28"	1.14"	T2 1/4	10	9527T155	0000
3021P	12V AC/12V DC	3W	25	0.25A	Incand.	Glass	Purple	Not Rated	0.28"	1.14"	T2 1/4	10	9527T156	0000
3021R	12V AC/12V DC	3W	25	0.25A	Incand.	Glass	Red	Not Rated	0.28"	1.14"	T2 1/4	10	9527T157	0000

Screw-In Base Light Bulbs

Tapered

Candelabra

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 or daylight 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.

Incandescent bulbs are traditional light bulbs. Many have been phased out due to governmental energy requirements, but some are still available for special applications.

Tapered Bulb—Candelabra Base (1/2" Dia.)
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, $	Pkg. Qty.		Pkg.
120V AC/120V DC
3W	Warm (2,400K)	10	Incand.	Dimmable	S6	Glass	Clear	3W	1,000	0.40	1	1628K26	00000

Bi-Pin Base Floodlight and Spotlight Bulbs

MR11

Often used in display and landscape lighting, these small bulbs produce a focused beam of light. Bulbs that are 50W or higher are often used in overhead projectors and microscopes. They’re brightest at the center of their beam angle; the edges of the beam are about half as bright. The narrower the beam, the more concentrated the light.

LED bulbs last longer and are more efficient than halogen bulbs. They generate little heat and withstand vibration. Plastic LED bulbs are shatterproof.

Small Pack
Equiv. Incand. Bulb Wattage	Base Number	Beam Angle	Light Appearance	Brightness, lumens	Bulb Trade Number	Light Setting	Light Technology	Bulb Material	CRI	Wattage	Rated Life, hrs.	Bulb Dia.	O'all Lg.	Pkg. Qty.		Pkg.
MR11 Bulb
12V AC
25W	GU4	40°	Warm (3,000K)	245	FTD	Not Dimmable	LED	Plastic	80	3W	25,000	1 1/4"	1 1/4"	1	8849N21	00000
Large Pack
MR11 Bulb
12V AC
25W	GU4	40°	Warm (3,000K)	245	FTD	Not Dimmable	LED	Plastic	80	3W	25,000	1 1/4"	1 1/4"	12	8849N22	00000