How bright is this bulb?

The SMF2 LED provides 24 lumens of light. That's about double the total light compared to your original 31mm-sized bulb, according to Diode Dynamics' in-house testing.

What colors are available?

This SMF2 LED bulb is available in blue, red, amber, green, cool white (6000K), and warm white (3000K). This listing is for the blue version.

Diode Dynamics

Diode Dynamics 31mm SMF2 LED Bulb - Blue (Pair)

Name: Diode Dynamics 31mm SMF2 LED Bulb - Blue (Pair)
Brand: Diode Dynamics
Price: 12.24 USD
Availability: InStock

$12.24

Direct replacement for your factory 31mm festoon bulb. Adds a modern LED appearance with a simple plug and play install.

Key Features

Direct replacement — swaps right in for factory 31mm festoon bulbs
Modern LED appearance — upgrades the yellowish incandescent bulb
Simple install — plug and play
Durable metal terminals — fits snugly in the socket
Light weight — won't vibrate loose over time
Constant-current circuitry — lasts for years, not months

⚠️ 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 345 vehicles

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Since 1957

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Product Details

The 31mm SMF2 LED bulb is a direct replacement for any 31mm-size bulb commonly found in vanity mirror lights in many vehicles. The SMF2 upgrades the factory yellowish incandescent bulb to a more modern LED appearance with increased output.