L-42MMW Lucas Lighting 42mm Festoon LED Interior Bulbs White – CANBUS (Pair)
Lucas Lighting L-42MMW 42mm Festoon LED Interior Bulbs White – CANBUS Pair
Upgrade your vehicle's factory 42mm festoon lighting with the Lucas Lighting L-42MMW 42mm Festoon LED Bulb Pair. Designed as a direct LED replacement for traditional halogen festoon bulbs, the L-42MMW provides brighter white illumination with instant-on performance while maintaining a simple replacement installation.
The 42mm festoon design is commonly used for vehicle dome lights, interior/cabin lighting, under-dash lighting, and license plate applications. Lucas Lighting designed these festoon LEDs for use with CANBUS-equipped vehicles to help avoid common bulb-out warning errors associated with LED conversions.
The L-42MMW is also compatible with a wide range of common 42mm bulb cross-reference numbers, making it a versatile replacement option for many factory festoon applications.
Sold as a pair – 2 bulbs included.
Key Features
- Lucas Lighting L-42MMW 42mm Festoon LED Bulbs
- 42mm festoon-style replacement bulb
- Sold as a pair – 2 LED bulbs
- Direct replacement for compatible halogen festoon bulbs
- Brighter white illumination than traditional halogen bulbs
- Instant-on LED performance
- Designed for CANBUS-equipped vehicle systems
- Helps avoid bulb-out errors associated with many LED conversions
- Ideal for dome, interior, under-dash, and license plate lighting
- Plug-in replacement design
- Multiple common 42mm bulb cross-references
42mm Festoon LED Bulb Replacement
The L-42MMW is designed specifically for applications requiring a 42mm festoon bulb. Festoon bulbs are commonly found in interior dome lights, cabin lighting, under-dash locations, and license plate lights.
Replacing an older halogen festoon with the L-42MMW provides a brighter white LED appearance and instant-on illumination while retaining the familiar festoon-style replacement format.
Lucas Lighting offers the Festoon LED series in 31mm, 36mm, 39mm, and 42mm sizes, so selecting the correct physical length is important for proper fitment.
Common 42mm Bulb Cross-References
The Lucas Lighting L-42MMW is compatible with the following listed 42mm bulb styles and cross-reference numbers:
- 211
- 212
- 212-2
- 214-2
- 4210
- 6413
- 6429
- 6451
- DE3423
- DE3423LL
- DE3425
- DE3425LL
- 42MMW
These numbers are provided as bulb-style cross-references. Always verify the original bulb length and contact configuration before ordering.
Upgrade Your Interior Lighting
Factory halogen festoon bulbs can produce a relatively warm and limited amount of illumination. The L-42MMW provides a brighter white LED light that can improve visibility inside the vehicle.
This makes the L-42MMW particularly useful for:
- Dome lights
- Map and cabin lighting
- Under-dash lighting
- Interior courtesy lights
- License plate lighting
- Other compatible 42mm festoon applications
Lucas specifically identifies dome, under-dash, and license plate lighting as common applications for its Festoon LED bulbs.
CANBUS Compatible Design
Modern vehicles can monitor factory lighting circuits and may detect an LED replacement differently than a traditional halogen bulb.
The Lucas Festoon LED series is designed for CANBUS systems to help avoid bulb-out errors, making the L-42MMW a useful upgrade for vehicles where electronic bulb monitoring is a concern.
CANBUS compatibility does not guarantee compatibility with every vehicle. Some vehicles may still require additional load-management components depending on the factory lighting system.
Direct Replacement Design
The L-42MMW uses the same general festoon-style format as the factory bulb it replaces, allowing it to be installed in compatible 42mm applications without changing the vehicle's lighting housing.
Before installation, compare the original bulb to the L-42MMW and confirm that the original bulb measures approximately 42mm and uses the same festoon contact configuration.
42mm vs. Other Festoon Sizes
Lucas Lighting offers four Festoon LED sizes:
| Lucas Size | Primary Application |
|---|---|
| L-31MMW | 31mm festoon applications |
| L-36MMW | 36mm festoon applications |
| L-39MMW | 39mm festoon applications |
| L-42MMW | 42mm festoon applications |
Do not select a festoon bulb based solely on appearance. A bulb that looks similar can still be the wrong length for the factory socket.
Installation
Installation is straightforward for compatible festoon applications:
- Remove the factory festoon bulb.
- Compare the original bulb length and contact configuration with the L-42MMW.
- Install the Lucas Lighting L-42MMW into the factory socket.
- Test the light before reinstalling the lens or housing.
- If necessary, remove and reinstall the bulb to ensure proper electrical contact.
Always allow the original bulb to cool before removing it, as halogen bulbs can become hot during operation.
Quick Specifications
| Specification | Details |
|---|---|
| Brand | Lucas Lighting |
| Model / SKU | L-42MMW |
| Product Type | Festoon LED Bulb |
| Size | 42mm |
| Quantity | 2 Bulbs |
| Light Color | White |
| Technology | LED |
| CANBUS | Designed for CANBUS systems |
| Installation | Direct replacement |
| Common Applications | Dome, interior, under-dash, license plate |
| Cross-References | 211, 212, 212-2, 214-2, 4210, 6413, 6429, 6451, DE3423, DE3423LL, DE3425, DE3425LL, 42MMW |
Specifications and cross-reference information are based on Lucas Lighting's current Festoon LED product information.
What's Included
- 2 × Lucas Lighting L-42MMW 42mm Festoon LED Bulbs
Important Fitment Information
Verify your original bulb size before ordering.
The L-42MMW is intended for applications using a 42mm festoon bulb. Festoon bulbs are available in several similar-looking lengths, including 31mm, 36mm, 39mm, and 42mm.
Check the original bulb or vehicle application to confirm the required size and socket/contact configuration.
The cross-reference numbers listed above are provided by Lucas Lighting for compatible 42mm bulb styles and should be used as a guide rather than a substitute for verifying the physical bulb in your vehicle.
Frequently Asked Questions
Is the Lucas L-42MMW sold individually?
No. The L-42MMW is sold as a pair of two LED festoon bulbs.
What size is the L-42MMW?
The L-42MMW is a 42mm festoon LED bulb.
What vehicles use 42mm festoon bulbs?
42mm festoon bulbs are used across many different vehicles for applications such as dome lights, interior lighting, under-dash lighting, and license plate lights. Exact application varies by vehicle.
Is the L-42MMW CANBUS compatible?
Lucas Lighting states that its Festoon LED bulbs are designed for CANBUS systems to help avoid bulb-out errors.
What bulbs does the L-42MMW replace?
Lucas lists the L-42MMW as compatible with several common 42mm bulb styles, including 211, 212, 212-2, 214-2, 4210, 6413, 6429, 6451, DE3423, DE3423LL, DE3425, DE3425LL, and 42MMW.
How do I know if I need the 42mm version?
Measure the factory festoon bulb from end to end or check the vehicle's original bulb number. If your vehicle requires a 42mm festoon bulb, the L-42MMW is the corresponding Lucas Lighting size.
Can I use the L-42MMW for a dome light?
Yes. Dome and interior lighting are among the common applications Lucas identifies for its Festoon LED bulbs.
Can I use the L-42MMW for a license plate light?
Yes, provided your vehicle uses a compatible 42mm festoon bulb in the license plate light housing. Lucas lists license plate lighting as a common Festoon LED application.
Do I need a separate CANBUS decoder?
Not necessarily. Lucas designed the Festoon LED series for CANBUS systems to help prevent bulb-out errors. However, vehicle electrical systems vary, so some applications may still require additional components.