How bright are these?

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

What is the warranty on these?

Diode Dynamics backs these SMF1 LEDs with a three-year replacement warranty. That means if you have any issues within three years, they'll replace them.

Diode Dynamics

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

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

$16.33

Direct replacement for factory 28mm festoon bulbs. Adds a modern LED appearance.

Key Features

Direct replacement — fits factory 28mm festoon bulb sockets
Modern look — adds a modern LED appearance
Plug and play — simple installation
Constant-current circuitry — prevents flickering and failure
Transient suppression — long-lasting reliability
Metal terminals — snug fit in the socket

⚠️ 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

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Since 1957

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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.