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 for interior lighting applications such as dome lights, map lights, and vanity mirror lights.

How does the light output of this bulb compare to the original?

The SMF1 LED bulb produces 16 lumens of light. According to Diode Dynamics, this provides similar light output to your original 28mm-sized bulb. If you want increased output, they recommend the SMF2 option.

What does the warranty cover?

Diode Dynamics offers a three-year replacement warranty on this product. The warranty covers failures due to manufacturing defects, but does not cover damage from improper installation or use.

Diode Dynamics 28mm SMF1 LED Bulb - Blue (Pair)

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Diode Dynamics

Diode Dynamics 28mm SMF1 LED Bulb - Blue (Pair)

Name: Diode Dynamics 28mm SMF1 LED Bulb - Blue (Pair)
Brand: Diode Dynamics
Price: 8.14 USD
Availability: InStock

$8.14

Direct replacement for factory 28mm festoon bulb. Adds a modern LED look with simple plug-and-play installation.

Key Features

Direct replacement — fits factory 28mm festoon bulb sockets
Modern look — adds an updated LED appearance
Simple install — plug-and-play replacement
Constant-current circuitry — prevents flickering and extends lifespan
Transient suppression — protects against voltage spikes
16 lumens output — similar brightness to original 28mm bulb

⚠️ 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 218 vehicles

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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.