Upgrade your vehicle’s lighting and appearance with the immaculately designed, intensely stylish light of the Philips X-tremeUltinon gen2 LED range.

Why buy the Philips X-tremeUltinon gen2 LED P21W 6000K (Twin)?

As with Philips’ first generation X-tremeUltinon range, the X-tremeUltinon gen2 range continues to enhance both the brightness and style of your vehicle’s lighting, while lasting for many years to come. Avoiding the unattractive ‘dotted’ effect of so many inferior LED bulbs on the market, the X-tremeUltinon gen2 creates a crisp white projection that is broad, intense and equally diffused.

With an impressively high light colour temperature of up to 6000K, the X-tremeUltinon gen2 achieves a striking, cool white light that both looks stylish and yet feels comfortable to the eyes. Where such an improved, vivid light would generally sacrifice lifespan in a halogen bulb, the low-wattage LED design by Philips offers a powerful, yet economically sounder approach to lighting. Owing to this – and Philips’ resilient construction – the X-tremeUltinon gen2 offers a tremendously long lifetime of up to 12 years.

The X-tremeUltinon gen2’s impressive light output, style and life expectancy is due to the bulbs’ innovative design and meticulous construction. Making use of only Philips Automotive-Grade Quality materials, the X-tremeUltinon offers a robust yet sleekly designed bulb, capable of expansive illumination that is also able to withstand extreme shocks and vibrational damage. And by using the latest in heat-management and beam placement systems, the X-tremeUltinon gen2 offers enhanced accuracy while being highly defensive against high (otherwise potentially destructive) temperatures.

Achieve maximum style with minimal effort today with the Philips X-tremeUltinon gen2.

(These X-tremeUltinon gen2 LED bulbs are not ECE-certified as road legal and are intended only for off-road usage. Additionally, they may trigger a bulb error message to appear on the vehicle's on-board computer system / dashboard. This, along with potential flickering, is a harmless side-effect owing to the difference between halogen and LED technology. Any such warning errors may be removed with the additional installation of a CANbus control unit.)

Features and benefits

  • Signalling light bulbs
  • 6000K colour temperature
  • Striking, crisp white LED light 
  • Long bulb lifetime – lasting up to 12 years
  • Improved style and visibility
  • Highly durable – resistant to extreme shock and heat
  • Philips Automotive-Grade Quality standard materials
  • May require additional purchase/installation of CANbus adapter
  • Not road legal – intended for off-road usage only  

About Philips

For over a century, Philips have been literally making the world a brighter place. Through using ever-advancing technology and adhering to the most rigorous and superlative of production standards, it isn’t hard to see why one in every three cars worldwide comes equipped with Philips lamps. A purchase from Philips not only offers best-in-class technology, but peace of mind.

 It is your own responsibility to ensure that the use of the LED retrofit lights complies with applicable local legal requirements.


Product specification

Number of Bulbs2
FittingP21W (382)
Bulb TypeStyling
RangeX-tremeUltinon LED gen2
Lumens350 lm
Road LegalNo
Kelvin RatingUp to 6000K
Light Improvement
Here's all you need to know about our delivery services on orders below:
Destination Delivery Method Delivery Time Price
UK Economy Delivery
FREE Delivery
Tracked Delivery 48 Hours
Tracked Delivery 24 Hours
*DPD Next Day Delivery
3-4 Working Days
3-4 Working Days
2-3 Working Days
1-2 Working Days
1 Working Day
£1.69 on orders under £14.99
Free on orders over £14.99

Standard Dlelivery

FREE Standard Delivery
Tracked Delivery  

7-10 Working Days

7-10 Working Days
5-7 Working Days

$5.75 on orders under $31.95

Free on orders over $31.95

Canada Tracked Delivery 7-10 Working Days $4.99
*US Standard Delivery
Tracked Delivery
7-10 Working Days
5-7 Working Days
Standard Delivery
Tracked Delivery
7-10 Working Days
5-7 Working Days
New Zealand Standard Delivery
Tracked Delivery
7-10 Working Days
5-7 Working Days
*Europe Standard Delivery
Tracked Delivery
7-10 Working Days
5-7 Working Days

We're now operating a new system for deliveries, whereby certain orders are processed on demand. This means that particular products may take longer to arrive, as we will request these from our supplier after you place your order - Please see individual product pages where delivery is impacted. But won't worry, it'll be worth the wait.

*We only ship to parts of the US, states include: California, Florida, Georgia, Illinois, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Texas, Virginia, Washington, Alabama, Arizona, Colorado, Iowa, Idaho, Kansas, Massachusetts, Maine, Missouri, Mississippi, Montana, North Dakota, New Mexico, Oklahoma, Oregon, South Carolina, Tennessee, Wisconsin

*We only ship to parts of Europe, countries include: Belgium, Cyprus, Denmark, Finland, France, Germany, Greece, Ireland, Netherlands, Portugal and Sweden.

*DPD Next Day Delivery orders to the UK, please note:

- Orders placed before 3:30pm Friday will be delivered Monday.
- Orders placed after 3:30pm Friday will be delivered Tuesday.

Unfortunately due to regular problems when delivering to certain countries via a non-tracked service, we cannot currently offer our free international delivery service to the following:

  • New Zealand

On rare occasions, due to factors outside of our control, delivery may take slightly longer. If you haven't received your order within the estimated time please accept our apologies. Please contact us and we'll be happy to provide further assistance.

Special note for Australia: We have been advised that parcels are currently expected to take 15-25 working days to arrive to Australia, depending on the location. This is due to measures being taken to prevent the spread of Covid-19. We are currently taking steps to try to reduce this delivery time as much as possible. 

Please note: If your parcel is being shipped internationally, additional customs fees may apply.

Customer Reviews


Bright White LED P21W


Bought for Fabia MKIII 1.2 TSI - No problems with Can Bus error and a lot brighter. Had to remove battery to fit near side! But not a fault of the bulb. MoT pass/fail only valid for Headlights/Section 4.1.4 so shouldn't fail MoT. So winner, winner, Chicken Dinner :) Very happy so far


Reviewed on:

Great site


I got these to replace the reversing light bulbs in my 2019 Skoda Superb having tried other led bulbs. They were a bit better but I think I'll go back to the original tungsten bulbs as I need actual light output not fancy looks.


Reviewed on:

philips led


Fantastic, fast shipping great product...


Reviewed on:



These are really bright, crisp white and makes my car look modern!


Reviewed on:

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Philips X-tremeUltinon gen2 LED P21W 6000K (Twin)

5.0 4 customer reviews

RRP: £39.99 You save £16.90

£ 23.09 -43%
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