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 W21/5W 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

FittingW21/5W (580)
Number of Bulbs2
Bulb TypeStyling
Wattage1.8 / 0.3W
Kelvin RatingUp to 6000K
Road LegalNo
Lumens240 / 40 lm
RangeX-tremeUltinon LED gen2
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
Australia Standard Delivery
Tracked Delivery  
7-10 Working Days
5-7 Working Days
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


T10 Philips 6000k


Very bright , recommend:)


Reviewed on:

Looks amazing and very visible


Very visible on the road and works as a proper DRL, it didn't have error on my 65 reg car dashboard but did on my other 13 plate reg. But works perfectly fine.


Reviewed on:

Philips X-tremeUltinon gen2 LED W21/5W 6000K


Globes were replacement on current Honda HRV. ( daytime running lights) Factory globes were very yellow and dull. these LED replacement globes have completely changed the look of the car and the white light is exceptional, far beyond expectations.


Reviewed on:

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Philips X-tremeUltinon gen2 LED W21/5W 6000K (Twin)

4.7 3 customer reviews

RRP: £39.99 You save £13.00

£ 26.99 -33%
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