Say the ceiling globe in your hallway just went dark. Before you drive anywhere, unscrew the dead unit and read its collar: the base code, shape code, and output printed there decide which light bulbs will fit, and almost every replacement on American shelves now is an LED. Home Depot, Lowe’s, Ace Hardware, Walmart, and Target cover the common sizes tonight. Specialty sites, Amazon, and eBay cover odd bases, tubes, and discontinued models.
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Read the Old Bulb Before You Shop
The base is the first filter, because a mismatch there ends the trip. Shape code, output, Kelvin, and dimming follow, and all of them are printed on the box.
| Base code | Common name | Where it turns up |
|---|---|---|
| E26 | Medium Edison screw | Most U.S. ceiling and table fixtures |
| E12 | Candelabra | Chandelier, sconce, night light |
| GU10 | Twist-lock pin | Track heads, some recessed trims |
| G4, GU24 | Bi-pin | Undercabinet, appliance, ceiling units |
Shape code. A19 is the standard pear silhouette, BR30 fills recessed cans, PAR38 handles outdoor floods and damp locations, B11 is the candle shape for small screw sockets, and ST19 is the exposed-element shape used in open fittings. The bulb type code sits beside the base type on the package, and the two together are what “different sizes” really means in the aisle.
- Pull the old unit and read the base code stamped on its collar.
- Match the shape code beside it; A19, BR30, and B11 do not interchange.
- Pick output by the Lighting Facts panel figure, not by watt equivalence.
- Choose one Kelvin value for the whole room.
- Confirm the dimming and enclosed fixture ratings before you pay.
Worn collar print? Take the dead unit along. A clerk can tell an E12 from the slightly larger E17 intermediate base by eye.
Which Light Bulbs Are Still Sold, and Why the Shelf Changed
A light bulb is an electric light source that converts electrical power into visible illumination. Inside a light-emitting diode, or LED lamp, that happens in a semiconductor chip rather than the heated filament Thomas Edison commercialized in the 1880s. Replacing a bulb in an older house usually means swapping technologies, not just parts.
Four technologies exist on paper; one is current. Since mid-2023 the U.S. Department of Energy has enforced a minimum of 45 lumens per watt for general service lamps, a bar almost no incandescent light bulb or halogen lamp can clear. The LED bulb is the default as a result, whether you are converting a whole house to LED lighting or filling a chandelier full of candelabra sockets, and the compact fluorescent lamp, or CFL, has largely faded from household aisles too. Those tubes contain mercury and belong in a recycling program, never household trash. The EPA’s guidance on cleanup and disposal covers what to do if one breaks.
Output, Color, and Dimming: Choosing the Right Light
Brightness in lumens. A lumen measures visible output; a watt measures electric power draw. What the box rarely spells out is that the 60W equivalent wording is a marketing translation, and two brands can print the same claim on noticeably different products. The figure on the Lighting Facts panel is the number that governs how bright it looks.
Color temperature. Kelvin describes tone, not strength. Around 2700K reads warm white and suits a bedroom; near 5000K reads like daylight and suits a kitchen, garage, or bathroom mirror. Mixing values in one room looks wrong.
Dimmer compatibility. Buy a dimmable model only if that circuit has a dimmer. A non-dimmable LED on a dimmer buzzes, flickers, and fails early, and older dimmers built for incandescent loads often need replacing anyway.
CRI and heat. CRI, the Color Rendering Index, scores how accurately colors appear under a source, which matters for accent lighting over food or a mirror. Heat is the other check, covered in the failure section below.
Energy use and rated life. An energy-efficient LED draws far less power than the bulb it replaces: ENERGY STAR, the federal efficiency program, says LED lighting produces light up to 90% more efficiently than incandescent bulbs, and the energy savings compound across a house. Its LED lighting page is the neutral reference on rated life claims, which assume the LED dims gradually rather than burning out.
Who Makes the Bulbs on the Shelf
The names on the boxes are mostly licenses, which matters when you chase a warranty or try to match an older product. Bulbs sold as Philips come from Signify, the former lighting arm of the Dutch electronics group, which licenses the name. GE Lighting has been owned by smart-home company Savant Systems since 2020 under a long-term license from General Electric. Sylvania in the U.S. and Canada is marketed by LEDVANCE, spun off from Osram and sold in 2017 to a group led by Chinese lighting maker MLS.
Cree and Feit Electric fill out the mass-market range, and store brands such as Great Value and Amazon Basics sit beside them. For brands like these, the warranty runs through the brand owner, so keep the box and receipt for any multipack you expect to last years.
Stores With Replacement Bulbs on the Shelf Tonight
Physical stores win when something burned out tonight. All five chains below stock the common screw-base sizes and differ on specialty depth.
Home Depot
Home Depot, the largest home improvement chain in the U.S., carries the widest single-store range: A19 LED packs, BR30 and PAR floods, tubes, decorative shapes, and smart models, shelved in the lighting aisle beside electrical. Browse their selection online to confirm local stock first.
Lowe’s
Lowe’s runs a comparable range and puts its lighting department next to fixtures, ceiling fans, and recessed trims, useful when the housing is being replaced too. Check availability at your nearest store.
Ace Hardware
Ace Hardware is the one to remember for orphan sockets. Franchise locations set their own inventory, and many keep appliance, three-way, and older pin-base stock in the lighting and electrical section. Check their category page first.
Walmart
Walmart, the largest brick-and-mortar retailer in the world, keeps everyday sizes near the hardware aisle, with Great Value multipacks doing most of the volume. Specialty shapes are thin. Shop their online catalog for anything the shelf misses.
Target
Target stocks a curated everyday range in its lighting section plus vintage-style shapes for exposed sockets. Depth is limited, so call ahead for small-base or unusual sizes. See their full catalog.
Menards covers the Midwest, Costco sells multipacks in bulk, and grocery and drug stores keep a few A19 packs. Our guides to buying batteries, electrical tape, and consumer electronics cover the rest of that aisle, and seasonal shoppers can compare Christmas lights and outdoor motion sensor lights.
Where to Order Odd Sizes Online
Order online for an uncommon base, a tube, a projector or vehicle type, or a quantity your store will not stock.
1000Bulbs.com
1000Bulbs.com sells nothing but lighting solutions, which is why it wins on odd stock: commercial lighting tubes, high intensity discharge units, warehouse and stadium floods, projector bulbs, and ANSI code lookups. If the ANSI code on your dead unit means nothing to you, start here. Visit their catalog.
Amazon
Amazon, the largest online retailer in the U.S., carries every major brand and shape of LED light bulbs in one category. The sidebar filters are the real feature: narrow by base type, Kelvin, wattage, and dimming capability before comparing. Browse the selection there.
eBay
eBay is where discontinued models, vintage lighting reproductions, and new old stock end up. Check seller feedback and photos, since relabeled stock is a known problem. Browse their listings.
Batteries Plus is worth a look for specialty light and vehicle types. For automotive lighting, our guide to buying headlights covers the sealed beam and bi-pin codes these catalogs use.
Why a New LED Fails Early (and How to Avoid It)
Most early LED failures are fixture problems wearing a bulb costume. The reason an LED dies young in a sealed globe is the driver: the small electronics in the base do not tolerate heat, and ENERGY STAR notes that higher operating temperatures shorten LED life, so failure rates climb in sealed housings. Flicker usually traces to a dimmer built for the old technology.
- Ignoring the enclosed fixture rating. If the package does not say it is rated for an enclosed fixture, assume it is not, and keep it out of sealed globes and tight recessed cans.
- Assuming every LED dims. Dimming is a feature, not a default. Check the box, then check the wall.
- Using a standard model in an appliance or three-way socket. Ovens, refrigerators, and range hoods need units rated for heat, vibration, or damp locations. A three-way socket needs a real three-way unit.
- Mixing technologies in one housing. An LED beside a halogen bulb in the same light fixture gives you two colors and two levels of output. Convert the whole thing in one pass.
- Binning the old tubes. Fluorescent bulbs carry mercury, and older fluorescent tubes often sit in a fixture with an aging ballast worth replacing at the same time. Recycle them rather than tossing them.
Five Light Bulbs Worth Starting With
These picks are grouped by the job they do, not by spec-sheet ranking. Plain LED multipacks are the cheapest upgrade on the shelf, while styled and color-tuned models cost more, so check current pricing at the retailer.
Best overall: Philips LED A19 multipack. A safe default for table and ceiling fixtures, with the enclosed rating and dimming status printed on the box. Check price on Amazon
Best budget: GE Basic LED A19 multipack. A no-frills line with a low cost per unit. Right for closets, hallways, the garage, and utility fixtures; read the box for dimming before you put one on a dimmer. Check price on Amazon
Best for ambiance: Sylvania LED vintage filament ST19. An exposed-element design for pendants and open sockets where the fitting is meant to be seen. Confirm dimmer compatibility separately, since decorative styles are inconsistent. Check price on Amazon
Best for color accuracy: Reveal LED A19. From the same maker as the Basic line, it is built around color rendering rather than raw output. Reveal is a color-enhanced line, not a 5000K daylight product, so read the Kelvin figure on the box if you want a cooler tone. Check price on Amazon
Best candelabra: Relax LED B11, E12 base. Another line from that maker, in the candle shape for a sconce or a multi-arm fitting with a warm tone. Count your sockets first, because a six-arm design eats a multipack. Check price on Amazon
Start at the socket. Pull the old unit, read the base and shape codes off the collar, then settle on output and Kelvin. Need it tonight? Home Depot, Lowe’s, Ace Hardware, Walmart, and Target stock the common sizes. For odd bases, tubes, or projector and vehicle types, order from 1000Bulbs.com or Amazon and add a spare. Buying light bulbs well takes one careful look at what you are replacing, and it changes how every room feels.
Common Questions About Light Bulbs
Are incandescent bulbs banned?
Not banned as objects. Since 2023, general service bulbs sold in the U.S. must reach 45 lumens per watt, which most incandescent and halogen products cannot do, so retailers stopped stocking them. Anything already in your closet is legal to use, and a few specialty categories such as appliance bulbs sit outside the general service rules.
What are the 4 types of light bulbs?
Incandescent, halogen, compact fluorescent, and LED. Only the last is widely sold for household use now. The first two heat a thin wire until it glows, CFLs excite mercury vapor inside a coated tube, and LEDs use a semiconductor chip.
Why do my bulbs keep burning out in one fixture?
Repeated failures in one fixture point at the fixture, not the product. Four causes cover most cases: an enclosed housing overheating the driver, a dimmer built for the old technology, a corroded socket contact, and vibration from a ceiling fan. Swapping in an enclosed-rated unit is the cheapest test.
Can they be recycled?
Fluorescent tubes and spiral fluorescents should be recycled for their mercury content. The EPA points shoppers to local household hazardous waste collections, to in-store programs at many hardware retailers (call first, since some take only certain types), and to the Earth911 search tool. LED units count as e-waste where a program exists.
Do LEDs expire sitting in a drawer?
No. An LED has no element to sag and no gas to leak, so shelf storage does almost nothing to it. Rated lifespan counts operating hours rather than calendar time, which makes buying a multipack and keeping spares sensible.
Which aisle are they in at a hardware store?
Electrical, almost always. Home Depot and Lowe’s shelve them in the lighting and electrical departments. Grocery and drug stores park a small indoor selection near cleaning supplies or seasonal goods instead.