What bulb do I need?
Pick where the bulb goes and get the base, the shape and what to check on the box.
Where does the bulb go?
What does the base look like?
With the power off and the bulb cool, compare its base with a bulb you know.
How wide is the tube?
With the power off, measure across the glass, or read the code printed on the tube or its box.
What is it?
What base does the old night light bulb have?
Unscrew the bulb and compare its metal end with a bulb you know.
Which LAVA lamp is it?
LAVA names each of its lamps by height and model, such as the 14.5" Classic.
Does the outdoor light switch itself on?
Turn the light off and give the bulb time to cool before you unscrew it.
Which one is it?
What does the old hood bulb look like?
What base does the old microwave bulb have?
Unplug the appliance or switch off its breaker, and let the bulb cool first.
What does the old oven bulb look like?
With the oven cool and its power off, take off the glass cover over the bulb.
What base does the appliance’s old bulb have?
Unplug the refrigerator or switch off its breaker, and let the bulb cool first.
What’s on the end of the old spotlight?
Switch the light off and let the spotlight cool before you take it out.
What’s in the fan’s light?
With the power off, take the grille or lens down to see the bulb.
What does the old vanity bulb look like?
Switch the light off and let the bulb cool before you take it out.
What base does the can’s old bulb have?
Turn the power off and let the bulb cool before you take it out.
How many brightness levels does the lamp’s switch give?
Start overWhich base does the old bulb have?
With the power off and the bulb cool, unscrew it and look at the metal end.
What fits
Candle bulbs, often E12
Chandeliers often take candle shapes (B, C or CA). Sconces take candle, globe or standard bulbs.
On the package: E12 candelabra, such as B10 or CA10
Available on Amazon
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A bulb rated for enclosed fixtures
Some LEDs are marked not for use in totally enclosed fixtures, because heat shortens their life.
On the package: Enclosed fixture rated
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The size and watts in your opener’s manual
Chamberlain’s openers are designed for A19 incandescent bulbs or CFLs of a similar size, up to 2.375" across and 4.43" long.
On the package: The opener manual’s size and maximum watts (A19 for Chamberlain)
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E26 medium base
The standard US screw base. Europe’s E27 looks alike but is used mainly on 220-240 volt systems.
On the package: E26 (medium)
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E12 candelabra base
The small US screw base of chandeliers, nightlights and decorative fixtures.
On the package: E12 (candelabra)
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E17 intermediate base
Between E12 and E26 in size, used in microwaves, refrigerators and other appliances.
On the package: E17 (intermediate)
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GU10 or GU24
Both push in and twist. GU10 is mostly on spotlights; GU24 also comes on regular-shaped bulbs such as an A19.
On the package: GU10, or GU24
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Match the code on the two-pin bulb
Small two-pin bulbs come with different bases, such as G4, GU5.3 and G9, and the bulbs don’t swap.
See also
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A T8 tube, 1" across
T8 tubes are 8 eighths of an inch wide. Feit’s 4 ft. F32T8 uses 32 watts on a two-pin G13 base.
On the package: T8, the same length, such as F32T8 for 4 ft.
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A T12 tube, 1-1/2" across
T12 tubes are 12 eighths of an inch wide. Feit’s F40DX/2, a 4 ft. T12, uses 40 watts on a medium bi-pin base.
On the package: T12, the same length, such as F40T12 for 4 ft.
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Read the code on the old tube
Tube codes include a T and a number, such as F32T8 or F40T12. The T number counts eighths of an inch across.
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A bulb with the watts on the warmer’s label
The bulb’s heat melts the wax, so keep to the watts the warmer lists.
On the package: The watts on the warmer’s label
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The warming bulb named for your lamp
Candle Warmers Etc. says a hardware-store bulb won’t melt the candle in its lamps.
On the package: The lamp maker’s bulb, at the watts on its label
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A bulb on the old one’s base, E12 or E17
Feit lists a 15 watt E12 bulb and a 40 watt E17 bulb for salt lamps.
On the package: E12 or E17, at the old bulb’s watts
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A C7 night light bulb, E12 base
The small candelabra screw base, which Feit’s 4 and 7 watt night light bulbs have.
On the package: C7, E12 (candelabra)
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An S11 bulb, E26 base
Feit’s 7-1/2 watt S11 is made for night lights with the standard screw base.
On the package: S11, E26 (medium)
Available on Amazon
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A plug-in LED night light
Feit sells its plug-in LED night lights whole, with no replacement bulb listed.
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A 15 watt incandescent bulb
LAVA’s chart calls it a sewing machine bulb.
On the package: 15 W incandescent
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A 25 watt incandescent bulb
LAVA’s chart calls it a refrigerator bulb.
On the package: 25 W incandescent
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A 40 watt A15 appliance bulb
LAVA uses the same bulb in its 17" Designer and 16.3" Premier.
On the package: 40 W A15
Available on Amazon
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A 40 watt R50 reflector bulb
A floodlight-type bulb, in LAVA’s chart for the 18.5" Double Play.
On the package: 40 W R50 reflector
Available on Amazon
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A 60 watt R20 reflector bulb
LAVA’s bulb for the 18.5" Royale.
On the package: 60 W R20 reflector
Available on Amazon
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A 100 watt R20F reflector bulb
For the 27" Lava Grande, the largest in LAVA’s chart, 250 oz.
On the package: 100 W R20F reflector
Available on Amazon
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The bulb on your lamp’s label
LAVA’s chart covers only its own lamps.
On the package: The watts and bulb type the lamp lists
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A bulb rated for wet or damp locations
Match the old bulb’s base and shape, then pick the rating for where the light hangs.
On the package: Wet rated, or damp rated under a roof
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A bulb the sensor can work with
A bulb’s box may say it isn’t compatible with photosensors, motion sensors or timers.
On the package: No “not compatible with photosensors, motion sensors or timers” line
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An A19 bulb, E26 base
Broan’s 403602 and its economy hoods take an A19, the economy hoods on the standard E26 base. Those and its 40000 series allow 75 watts at most.
On the package: A19 E26, within the hood’s watts
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An E17 bulb, such as a T7
Feit lists its 40 watt T7 appliance bulb, on the E17 intermediate base, for microwaves and range hoods.
On the package: E17, often a T7
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A PAR reflector bulb
Several GE hoods, such as the JV666 and JV535, specify a PAR20 of 50 watts at most.
On the package: The PAR code on the old bulb, such as PAR20 or PAR16
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A GU10 bulb
GE’s JVX5300, JVX5305 and PVX7300 hoods have flat, round halogens at the front corners.
On the package: GU10, at the old bulb’s watts
Available on Amazon
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A two-pin halogen, such as G4
GE’s hoods with G4 halogens take a 12 volt G4, 20 watts at most. Feit lists a 120 volt G8 LED for range hood lights.
On the package: The code on the old bulb, such as G4 (12 V)
Available on Amazon
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A built-in appliance light
With no bulb to unscrew, the light is replaced as a part.
See also
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An E17 appliance bulb
The intermediate screw base, used in microwaves, refrigerators and other appliances.
On the package: E17 (intermediate)
Available on Amazon
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An appliance bulb, E26 base
The standard screw base. Small appliance bulbs such as the A15 come on it.
On the package: E26 (medium), often an A15
Available on Amazon
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Match the two-pin bulb’s code
Two-pin bulbs come with different bases, and one kind doesn’t fit another.
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A 40 watt appliance bulb
GE, Frigidaire and Whirlpool name a 40 watt appliance bulb or a small halogen, depending on the model. GE says not to use a standard 40 watt bulb.
On the package: 40 W appliance bulb
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A G6.35 halogen bulb
GE’s ovens with a straight-pin halogen take a 120/130 volt G6.35, 50 watts at most.
On the package: G6.35 halogen, 120/130 V, the manual’s watts
Available on Amazon
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A G9 halogen bulb
GE’s ovens with a looped-pin halogen take a 120/130 volt G9, 50 watts at most.
On the package: G9 halogen, 120/130 V, the manual’s watts
Available on Amazon
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A service call
GE says the LED lights in its ovens typically need service to replace.
See also
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An A15 appliance bulb, E26 base
A small standard-shape bulb on the standard screw base. GE’s refrigerator LED is one.
On the package: A15 E26 (appliance)
Available on Amazon
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MR16 with a GU5.3 base
A 12 volt spotlight with two pins on a small reflector, run through a transformer.
On the package: MR16 GU5.3, 12 V
Available on Amazon
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GU10 spotlight bulb
Two pins you push in and twist, on household 120 volts, used mostly in spotlights.
On the package: GU10
Available on Amazon
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A PAR or BR reflector bulb
PAR bulbs are made for a focused beam, as on track lights. BR bulbs give a wider wash.
On the package: PAR20, PAR30, R20 or BR30, on E26
Available on Amazon
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A screw-in bulb within the fan’s watts
Broan’s 750 takes an A19 up to 100 watts, and its 765H80L only an A19 LED up to 14 watts.
On the package: The type and most watts in the fan’s manual
Available on Amazon
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A GU24 LED bulb
Broan’s QT130LE takes two GU24 LEDs, 10 watts each at most and 4.1" long at most.
On the package: GU24 LED, within the fan’s watts and length
Available on Amazon
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The night light bulb the fan lists
Broan’s 750 takes a night light bulb of 7 watts at most, and its QT130LE a 4 watt C7.
On the package: The night light watts in the fan’s manual
Available on Amazon
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A built-in LED module
Broan’s AE80LK lights with an integrated LED module in place of a bulb.
See also
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A globe bulb, such as a G25
A G25 is 3-1/8" across.
On the package: G25, E26 or E12, damp rated
Available on Amazon
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BR30 or BR40 reflector bulb
BR (bulged reflector) bulbs spread a wide wash of light, which suits recessed cans.
On the package: BR30 E26, or BR40 E26
Available on Amazon
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Check the built-in LED’s maker
A flat LED panel has no bulb to unscrew. Its maker and model tell you what replaces it.
See also
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A19 bulb, E26 base
The standard bulb for most table and floor lamps.
On the package: A19 E26
Available on Amazon
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A 3-way bulb
A lamp with one socket that clicks through three levels needs a 3-way bulb. Its base has an extra contact for them.
On the package: 3-way, such as 50/100/150 W replacement (E26)
Available on Amazon
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E12 candelabra bulbs
The small screw base some fan light kits use. GE’s A15 ceiling fan LED has it.
On the package: E12 (candelabra)
Available on Amazon
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E26 medium base bulbs
The standard screw base, found in some fan light kits.
On the package: E26 (medium)
Available on Amazon
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Before you change any bulb, turn the power off and let the old bulb cool.
Common questions
What if the old bulb has no code on it?
Pick “Something else” in the finder and tell the base apart by its look (see Light Bulb Base Types), or check the bulb's box if you still have it.
What do I need from the old bulb?
Its base and shape codes, such as A19 E26, its brightness (lumens, or the watts on an old incandescent), and its light color in kelvin. Take the old bulb, or a photo of its label, to the store to match all of them.
Can I use an LED with a timer or motion sensor?
Check the box first: some LEDs are marked not compatible with timers, photocells or motion sensors.
Where we get our information from
The bases, shapes and box wording come from the bulb makers’ own guides and product pages, ENERGY STAR (EPA), the FTC’s Lighting Facts label rule, the DOE’s ceiling fan rule, Chamberlain’s garage door opener support articles, and OSHA’s damp and wet definitions. Checked against published data from Feit Electric, ENERGY STAR, GE Lighting, Signify and LEDVANCE (plus 16 more).
See all 39 sources
- FTC Appliance Labeling Rule, 16 CFR 305.23: the Lighting Facts label (brightness, yearly cost, life, light appearance, energy used, mercury; 3-way levels)
- ENERGY STAR (EPA), “LED Bulbs Made Easy” purchasing guide (2020): lumens, light color, bulb types by fixture
- ENERGY STAR Program Requirements for Lamps, Version 2.1 (2020): equivalence ranges, 3-way and reflector bulbs, packaging wording, color names
- ENERGY STAR (EPA), “Learn About LED Lighting”: heat and LED life
- GE Lighting, “A Guide to Light Bulb Sizes, Types, Shapes, and Codes” (2022)
- Feit Electric, “Decoding Bulb Shapes and Sizes” (2017)
- Philips Lighting (Signify), Lamp Specification Guide 2015: shape codes, color rendering, color names, safety notes
- Philips Hue (Signify), “Bulb size guide”: bases, shape families, typical sizes
- LEDVANCE, light bulb size and shape guides and “E26 vs A19” (blogs)
- Feit Electric, recessed, flood and spot bulb pages and FAQs: BR30, BR40, PAR30, MR16 and GU10
- Feit Electric product pages: E17 microwave bulb (BP40T8N/MW) and GU24 A19 LED (OM60DM/927CA/GU24)
- 10 CFR 430.32(s) and (t): ceiling fan light kits and torchieres (190 W limit)
- Chamberlain Group support, “Light Bulbs That Can Be Used in Garage Door Openers”
- 29 CFR 1910.399: damp, dry and wet location definitions (workplace electrical rule)
- TCP Lighting, “The Difference Between Indoor & Outdoor Light Bulbs”
- GE Lighting, A15 LED bulbs: refrigerator bulb (40 W replacement, E26) and ceiling fan bulb (candelabra base)
- GE Lighting, 3-way A19 LED bulb (150/100/50 W replacement, DC medium base)
- US Consumer Product Safety Commission, Home Electrical Safety Checklist (Pub 513): bulb wattage for the fixture
- Westinghouse Lighting, “Bulb Size” guide, and lamp catalog: shape sizes in eighths of an inch
- Satco, SA2985 3-way lamps sheet: 100/200/300 W mogul (E39) 3-way for torchiere-style lamps
- Chamberlain Group support, “My garage door opener light bulbs keep burning out”
- Halo (Cooper Lighting Solutions), H7 6" recessed housings (H7ICAT IC, H7TAT non-IC): product page, spec sheet and instruction sheet
- LEDVANCE, “BR30 vs. BR40: What’s the Difference?” (blog): bulb sizes and can sizes
- Westinghouse Lighting, 5323000 G25 LED (6G25/LED/DIM/SW/30) specification sheet: E26, damp and enclosed ratings, compatible dimmers
- Feit Electric, G25 filament globe LED product pages (G2560/927CA/FIL, G2540/930CA/FIL): E26, damp, enclosed fixture rated, bath and vanity
- Feit Electric, 4W C7 E12 candelabra base night light bulb (BP4C7/W/4/RP) product page
- LAVA (lavalamp.com), FAQ: the Replacement Bulbs chart by lamp model, how the lamp works, setup and care; and its replacement bulb pages (5015, 5025, 5032, 5041-25, 5010)
- Scentsy, warmer bulb pages (10, 15, 20 and 25 W), a warmer's and the mini warmer bases' product pages, its FAQ (read in a browser) and the Scentsy Fragrance FAQs sheet (2013): the bulb wattage on the silver label
- Feit Electric product pages: wax warmer and salt lamp bulbs (BP15C71/2, 15 W C7 E12; BP20G121/2, 20 W G12-1/2 E12; BP40T8N, 40 W T8 E17)
- Candle Warmers Etc. (candlewarmers.com), FAQ; replacement bulb pages (NP1 35 W, NP5 25 W, NP7 15 W, NP3 40 W) and candle warmer lamp pages naming their bulbs
- Feit Electric product pages: night light bulbs (BP7C7/4, 7 W C7 E12; BP7C7/827/LED/4, 0.6 W LED C7; BP71/2S and BP71/2S/CW, 7.5 W S11 E26; BP71/2S/W/LED, 0.6 W LED S11) and the NL1/LED plug-in LED night light
- Feit Electric product pages: 40 W A15 bulbs that list ovens (40A15/CL/2/HDRP, E26; 40A15C/CL/CF/2/HDRP, E12)
- GE Appliances support articles: oven light replacement (glass cover, and glass cover with wire holder); under-cabinet vent hood light bulbs; PAR20 and G4 halogen vent hood lamps
- Frigidaire use and care manuals (on Electrolux's server): electric range, p/n 316417064 (2005), and induction range, A26582003 (2023): changing the oven light
- Whirlpool product help, “Removing and Replacing the Oven Light” (read in a browser)
- Feit Electric product pages: bulbs that list range hoods (BP40T7N-130, 40 W T7 E17; PAR1645DM/6WYCA/2 and PAR16DM60/930CA/2, PAR16 LED E26; BP20G8/850/LED, G8 LED)
- Broan-NuTone range hood pages and manuals: 403602 and the 40000, 41000 and 42000 series installation guide; 412401, F403011 and BUEZ130SS and the economy hoods quick start manual
- Broan-NuTone fan and light pages and installation guides: 750 (100 W light, 7 W night light), QT130LE (10 W GU24 LED, 4 W C7 night light), 765H80L (A19 E26 LED up to 14 W) and AE80LK (integrated LED module)
- Feit Electric tube pages: F40DX/2 and F20T12/CW/2 (T12) and F32T8/941/2 (T8) fluorescent tubes, T1248/4CCT/LED/2 and T48/840/LED/2 Type A LED tubes, and its LED tube ballast compatibility page
General guidance from manufacturer and standards data. Products vary, so check the label and the maker's instructions.