What is a 'festoon' bulb?

A festoon bulb is a type of automotive bulb that is cylindrical in shape with metal caps on both ends. They are commonly used in interior lighting applications, such as dome lights, map lights, and vanity mirror lights.

How does the light output of this SMF1 LED compare to the factory bulb?

The SMF1 LED provides similar light output to your original 28mm-sized bulb, measured at 16 lumens. If you are looking for increased output, Diode Dynamics recommends their SMF2 option.

What does the Diode Dynamics warranty cover?

Diode Dynamics warranties this product against failures for three years. If you have any issues, contact Diode Dynamics for a replacement.

Diode Dynamics 28mm SMF1 LED Bulb - Amber Set of 4

1 / 5

Diode Dynamics

Diode Dynamics 28mm SMF1 LED Bulb - Amber Set of 4

Name: Diode Dynamics 28mm SMF1 LED Bulb - Amber Set of 4
Brand: Diode Dynamics
Price: 16.33 USD
Availability: InStock

$16.33

Direct replacement for 28mm vanity mirror bulbs. Modern LED appearance, simple install.

Key Features

Direct replacement — fits factory 28mm festoon bulb sockets
Modern look — adds a modern LED appearance
Simple install — plug and play
5050-size SMD — one LED per bulb
Lightweight design — won't vibrate loose over time
Constant-current circuitry — prevents flickering and extends lifespan

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Will this fit your vehicle?

Compatible with 193 vehicles

Need Help?

631-982-0042

Fast Shipping

Nationwide delivery

Secure Checkout

Safe & protected

Since 1957

Family-owned

Product Details

The 28mm SMF1 LED bulb is a direct replacement for any 28mm-size bulb commonly found in vanity mirror lights in many vehicles. The SMF1 upgrades the factory yellowish incandescent bulb to a more modern LED appearance.