For bulbs labeled A19, A15, and A21, what does the "A" mean, and how do those numbers relate to the bulb?

The "A" refers to the traditional, pear-shaped bulb, a common style for homes. The number indicates the bulb's diameter at its widest point, in eighths of an inch, so an <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/A19/N-5yc1vZbmbuZ1z0vvrd?emt=plpfaq_2508_lightbulbs" style="text-decoration: underline;">A19 bulb</a> is 19/8 inches wide, an <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/A21/N-5yc1vZbmbuZ1z0vvpm?emt=plpfaq_2508_lightbulbs" style="text-decoration: underline;">A21</a> is slightly larger at 21/8 inches, and an <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/A15/N-5yc1vZbmbuZ1z0vvqn?emt=plpfaq_2508_lightbulbs" style="text-decoration: underline;">A15</a> is smaller at 15/8. Knowing this helps when choosing the right size for your fixtures and the light needed.

Are type A EcoSmart bulbs available, and what are their benefits?

Yes, type A <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/EcoSmart/N-5yc1vZbmbuZ4b8?emt=plpfaq_2508_lightbulbs" style="text-decoration: underline;">EcoSmart light bulbs</a> offer the perfect combination of the traditional bulb shape with energy-saving LED technology. You get the familiar look and feel of a standard Type A bulb but with the benefits of reduced energy usage, extended lifespan, and lower long-term costs.

What are the key benefits of switching to LED light bulbs in my home?

<a href="https://www.homedepot.com/b/Lighting-Light-Bulbs-LED-Light-Bulbs/N-5yc1vZbm79?catStyle=ShowProducts?emt=plpfaq_2508_lightbulbs" style="text-decoration: underline;">LED light bulbs</a> are incredibly energy-efficient, using up to 80% less energy than traditional incandescent bulbs, translating to significant savings on electricity bills. They also have a much longer lifespan, meaning fewer replacements and less hassle.

What are some of the best-selling incandescent light bulbs?

One of our best-selling incandescent light bulbs is the <a href="https://www.homedepot.com/p/Feit-Electric-250-Watt-BR40-Clear-Reflector-E26-Heat-Lamp-Dimmable-120-Volt-Infrared-Incandescent-Light-Bulb-1-Pack-250R40-1-HDRP/312502110?emt=plpfaq_2508_lightbulbs" style="text-decoration: underline;">250-Watt BR40 Clear Reflector E26 Heat Lamp Dimmable 120-Volt Infrared Incandescent Light Bulb (1-Pack)</a>.

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Light Bulb Base Code: E26

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Feit Electric250-Watt BR40 Red Reflector E26 Heat Lamp Dimmable 120-Volt Infrared Incandescent Light Bulb (1-Pack)

(4.2 / 472)

Model# 250R40/R/HDRP

$1198

Best Seller

Feit Electric40-Watt A15 E26 Appliances Oven Refrigerator Ceiling Fan Incandescent Clear Light Bulb, Soft White 2700K (2-Pack)

(4.4 / 748)

Model# 40A15/CL/2/HDRP

$848

/package($4.24 /bulb)

Feit Electric250-Watt BR40 Clear Reflector E26 Heat Lamp Dimmable 120-Volt Infrared Incandescent Light Bulb (1-Pack)

(4 / 331)

Model# 250R40/1/HDRP

$1048

Top Rated

Feit Electric125-Watt BR40 Clear Reflector E26 Heat Lamp Dimmable 120-Volt Infrared Incandescent Light Bulb (1-Pack)

(4.3 / 276)

Model# 125R40/1/HDRP

$948

Top Rated

Feit Electric60-Watt ST19 Dimmable Cage Filament Amber Glass E26 Vintage Edison Incandescent Light Bulb, Warm White (6-Pack)

(4.1 / 393)

Model# 60ST19/6

$2597

/package($4.33 /bulb)

Feit Electric25-Watt Soft White (2700K) A15 Frosted Glass E26 Base Dimmable Incandescent Appliance Light Bulb

(4.1 / 430)

Model# BP25A15/HDRP

$548

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40-Watt T10 Medium E26 Base Dimmable Incandescent Light Bulb, Soft White 2700K (1-Pack)

+more available options

Feit Electric40-Watt T10 Medium E26 Base Dimmable Incandescent Light Bulb, Soft White 2700K (1-Pack)

(4.6 / 538)

Model# BP40T10/HDRP

$768

Bulk Savings

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Globe Electric60 Watt ST19 Dimmable Cage Filament Vintage Edison Incandescent Light Bulb, Warm White Light

(4.2 / 410)

Model# 01321

$645

Globe Electric60 Watt ST19 Dimmable Cage Filament Vintage Edison Incandescent Light Bulb, Warm White Light (3-Pack)

(4 / 334)

Model# 31321

$1277

/package($4.26 /bulb)

200-Watt High Lumen Clear A21 Medium E26 Soft White (2700K) Utility Incandescent Light Bulb (1-Pack)

+more available options

Feit Electric200-Watt High Lumen Clear A21 Medium E26 Soft White (2700K) Utility Incandescent Light Bulb (1-Pack)

(4.4 / 163)

Model# 200A/CL/HDRP

$498

Feit Electric40-Watt ST19 Dimmable Cage Filament Amber Glass E26 Vintage Edison Incandescent Light Bulb, Warm White

(4.3 / 96)

Model# 40ST19

$597

Feit Electric60-Watt ST19 Dimmable Cage Filament Amber Glass E26 Vintage Edison Incandescent Light Bulb, Warm White

(4 / 221)

Model# 60ST19

$597

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Feit Electric250-​Watt BR40 Red Reflector E26 Heat Lamp Dimmable 120-​Volt Infrared Incandescent Light Bulb (1-​Pack)​

Feit Electric40-​Watt A15 E26 Appliances Oven Refrigerator Ceiling Fan Incandescent Clear Light Bulb, Soft White 2700K (2-​Pack)​

Feit Electric250-​Watt BR40 Clear Reflector E26 Heat Lamp Dimmable 120-​Volt Infrared Incandescent Light Bulb (1-​Pack)​

Feit Electric125-​Watt BR40 Clear Reflector E26 Heat Lamp Dimmable 120-​Volt Infrared Incandescent Light Bulb (1-​Pack)​

Feit Electric60-​Watt ST19 Dimmable Cage Filament Amber Glass E26 Vintage Edison Incandescent Light Bulb, Warm White (6-​Pack)​

Feit Electric25-​Watt Soft White (2700K)​ A15 Frosted Glass E26 Base Dimmable Incandescent Appliance Light Bulb

Feit Electric40-​Watt T10 Medium E26 Base Dimmable Incandescent Light Bulb, Soft White 2700K (1-​Pack)​

Globe Electric60 Watt ST19 Dimmable Cage Filament Vintage Edison Incandescent Light Bulb, Warm White Light

Globe Electric60 Watt ST19 Dimmable Cage Filament Vintage Edison Incandescent Light Bulb, Warm White Light (3-​Pack)​

Feit Electric200-​Watt High Lumen Clear A21 Medium E26 Soft White (2700K)​ Utility Incandescent Light Bulb (1-​Pack)​

Feit Electric40-​Watt ST19 Dimmable Cage Filament Amber Glass E26 Vintage Edison Incandescent Light Bulb, Warm White

Feit Electric60-​Watt ST19 Dimmable Cage Filament Amber Glass E26 Vintage Edison Incandescent Light Bulb, Warm White

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