4W Light Bulbs | McMaster-Carr

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9 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.

About Replacing Tubular Fluorescent 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.
901	12.8V DC	4W	47	0.31A	Incand.	Glass	Clear	Not Rated	0.63"	1.49"	T5	10	1505K217	00000

Screw-In Base Light Bulbs

Cone

Globe

Tapered

Medium (Standard Household)

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.

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

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

Bulbs that cannot be sold to the listed areas are restricted due to energy efficiency requirements, mercury regulations, and product registration requirements.

Cone 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, $	Cannot Be Sold To	Pkg. Qty.		Pkg.
120V AC/120V DC
4W	Warm (2,400K)	15	Incand.	Dimmable	C7	Glass	Clear	4W	3,000	0.50	__	10	1628K175	000000
Globe Bulb—Medium (Standard Household) Base (1 1/16" Dia.)
120V AC
40W	Warm (2,700K)	350	LED	Dimmable	G40	Glass	Clear	4W	15,000	0.48	__	1	1449T49	0000
Tapered Bulb—Medium (Standard Household) Base (1 1/16" Dia.)
120V AC
40W	Warm (2,700K)	300	LED	Not Dimmable	S14	Plastic	Frosted	4W	25,000	0.48	CA	1	8715K321	0000

Twist-and-Lock Base Floodlight Bulbs

Lock these bulbs into GU10 sockets with a twist. Often used in recessed can fixtures and track lighting, they provide a focused beam of light.

Bulbs with a selectable light appearance have a switch on the top, so you can match other lights in your room.

Small Pack
Equiv. Incand. Bulb Wattage	Beam Angle	Light Appearance	Light Setting	CRI	Brightness, lumens	Light Technology	Bulb Material	Wattage	Rated Life, hrs.	Bulb Dia.	O'all Lg.	Features	Pkg. Qty.		Pkg.
MR16 Bulb
120V AC
35W	40°	Warm (3,000K) Neutral (4,000K) Cool (5,000K)	Dimmable	90	300	LED	Plastic	4W	25,000	2"	2"	Selectable Light Appearance	3	8851N12	000000
Large Pack
MR16 Bulb
120V AC
35W	40°	Warm (3,000K) Neutral (4,000K) Cool (5,000K)	Dimmable	90	300	LED	Plastic	4W	25,000	2"	2"	Selectable Light Appearance	18	8851N13	00000

Bi-Pin Base Tubular Light Bulbs

T5 and T5/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 or daylight 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. Ballast bypass bulbs eliminate the need for a ballast so the socket must be wired directly to the power source.

Plastic-coated glass bulbs are shatter resistant; the coating retains glass shards if they break.

T5 Bulb (5/8" 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, $	Bulb Trade Number	Pkg. Qty.		Pkg.
6"	4W	Cool (4,000K)	150	82	Not Dimmable	Plastic-Coated Glass	LED	Ballast Bypass	2W	50,000	0.24	F4T5	2	1562K84	000000
6"	4W	Cool (4,000K)	150	82	Not Dimmable	Plastic-Coated Glass	LED	Ballast Bypass	2W	50,000	0.24	F4T5	10	1562K85	00000

Blacklight Blue Light Bulbs

Detect UV-reflective materials that are invisible to the naked eye with these bulbs. They contain a blue filter that absorbs the visible light they produce while allowing long wave ultraviolet (UV-A) light to pass through. They appear black when turned off. These bulbs are not for use in bug zappers. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh.

Bulbs cannot be sold to the listed areas because they exceed local regulatory limits on mercury.

T5 Bulb (5/8" Dia.)
O'all Lg.	Wattage	Brightness	Bulb Material	Color	Rated Life, hrs.	Est. Yearly Energy Cost, $	Bulb Trade Number	Wavelength Type	Cannot Be Sold To		Each
6"	4W	Not Rated	Glass	Blue	5,000	0.48	F4T5	UV-A	Canada, CA, CO, HI, ME, MN, OR, RI	8311K41	000000

About Replacing Tubular Fluorescent Light Bulbs

Wedge Base Miniature Light Bulbs

Screw-In Base Light Bulbs

Twist-and-Lock Base Floodlight Bulbs

Bi-Pin Base Tubular Light Bulbs

Blacklight Blue Light Bulbs