What size is this bulb?

This is a 39mm festoon bulb. It is a direct replacement for any 39mm-size bulb, commonly found in vanity mirror lights in many vehicles. Check your vehicle's bulb size before ordering to ensure proper fitment.

How bright is this bulb?

The SMF2 LED provides 24 lumens of blue light. That's about twice the total light compared to your original 39mm-sized bulb. All Diode Dynamics LED lighting is rated with accurate, measured lumen figures.

What if the bulb fails?

This bulb is built with constant-current circuitry, along with transient suppression, so it should last for years. However, like every Diode Dynamics product, it's backed by a three-year replacement warranty. If it fails within that time, contact Diode Dynamics for a replacement.

Diode Dynamics

Diode Dynamics 39mm SMF2 LED Bulb - Blue (Single)

Name: Diode Dynamics 39mm SMF2 LED Bulb - Blue (Single)
Brand: Diode Dynamics
Price: 6.09 USD
Availability: InStock

$6.09

Direct replacement for factory 39mm festoon bulbs. Adds a modern LED appearance.

Key Features

Direct replacement — fits right in place of a factory 39mm festoon bulb
Modern LED appearance — upgrades the yellowish incandescent bulb
Simple install — plug and play
Two 5050-size SMDs — more light output than the factory bulb
Durable metal terminals — fits snugly in the socket
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