Philips X-treme Ultinon P21/5W Red LED (Twin)


Philips X-treme Ultinon P21/5W Red LED (Twin)

Why buy me?

The latest trend in the world of automotive lighting is LED lighting. The X-treme Ultinon P21/5W LED Retrofit is part of a new range of signaling and interior lighting LED bulbs by Philips. By choosing these bulbs by Philips you know you’re getting the highest quality product on the market. Against halogen bulbs there’s no comparison, LED bulbs give off a much brighter intense light with greater longevity.

Please be aware that this range of X-treme Ultinon P21/5W LED Retrofit bulbs is designed for interior use. They can be used in an exterior application but it is not road legal to do and, in addition, due to technical differences between LED and halogen technology, a vehicle warning light may be triggered depending on the configuration of your vehicle. This is more likely to happen if your car was manufactured after 2005. We recommend purchasing the CANbus Control Unit for LED lamps to solve this issue. 

Features and benefits

  • Intense red light
  • Better light output
  • Wider beam pattern perfect
  • Long life, maintenance free
  • High temperature resistance: large aluminium heat sink
  • Vibration resistance
  • Very long lifespan – up to 12 years
  • Plug and play
  • Simple to fit
  • Multivoltage: compatible with most vehicles

The technical bit


Number of bulbs: 2
Brand: Philips
Fitting: P21/5W
Bulb type: LED
Voltage: 12V
Wattage: 1W
Road legal: No

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


Number of Bulbs2
FittingP21/5W (380)
Bulb TypeStyling
RangeX-tremeUltinon LED
Road LegalNo
Kelvin RatingN/A

Delivery Information

We aim to dispatch all orders the same/next business day. Delivery times on our standard delivery service are:

UK: 2-3 business days*
Europe: 5-7 business days*
Rest of the World: 5-10 business days*

Need your order faster?
Customers in the UK, US & Canada can also upgrade to an express delivery service. Delivery times for this service are:

UK Next Business Day (DPD): £5.49
US & Canada 2-4 Business Days (FedEx): £13.99

*average delivery times.

RRP: £54.99 You save £24.00

£ 30.99

5.0 Based on 10 customer reviews


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Customer Reviews

Philips X-treme Ultinon P21/5W Red LED (Twin)


Perfect product, bright and stylus for Fiesta S MK7

Philips X-treme Ultinon P21/5W Red LED (Twin)

5up graded stop and tail lights

Placed a order for Bulbs approximately 1545 yesterday 9th May with no postage to pay Bulbs arrived first thing this Morning what a pleasant surprise. Bulbs have been fitted and are excellent, great product and brilliant service will certainly recommend this company to my friends

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Great bulbs

I got these bulbs for my 1990 air cooled Porsche. The rear lights are quite small so I thought I would give them a try. The difference from a standard bulb is amazing,these bulbs are much brighter. They make the car much more visible. I’m very pleased with the purchase so I brought the P21w for the fog lights and the reversing lights. As always the service from Power bulbs was superb,fast secure delivery and also got 25 percent off. I would definitely recommend both the bulbs and power bulbs.

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Excellent Red !!!!

I put them in the tail lights of my Hyundai IX35 and the result was amazing. Much more intense of red light. It's increase the security on the road. Good choice, great maker. Buy it!

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Extemely bright

Best after market led. Extremely bright and not to worry about led burn out of not functioning. Trusted brand that garenteed it will last the life time of your car. Very satisfied.

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Very good product

My 2nd order already, very fast shipping to Belgium. Both orders were delivererd within 3 days, thats excellent. Packages are sealed and protected very well. Okay, time for the review. Very happy these bulbs works on my car. The brightness of these bulbs are bloody bright and super intense. You can't go wrong with philips, the bulbs are also of very high quality and weight couple times more than any other aftermarket led bulbs. They light up instantly when braking, which is much more safer than incadescent bulbs. Give much less heat (almost no heat at all) and use only around 1-2 watts per bulb compared to 21 watt incadescent bulbs. Really recommend the Xtreme vision line of Philips. Thank you Powerbulbs for the great service, will order again when i need something!

Philips X-treme Ultinon P21/5W Red LED (Twin)

5The modern way to stop!

These LED Stop-tail light bulbs are fantastic as a replacement for OEM bulbs. Space age modern design, RED,, bright and really high quality. The team from Power Bulbs are so professional and offer great pricing. The only way to buy my automotive globes. Ken

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Excellent product

These bulbs work fine in our Citroën DS3. Very bright (brighter that the original), even though the lens is also red. They are simple to mount en pair well with the yellow versions that are installed as flasher. Highly recommendable, therefore!

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Quality Product

Very happy with my purchase of these LED bulbs. A little expensive, but well worth the cost. Because there are only 2 LED's per bulb they appear similar to a standard filament bulb when lit unlike cheaper "corn cob" style LED bulbs. They are however, considerably brighter than a standard bulb.

Philips X-treme Ultinon P21/5W Red LED (Twin)

5Philips P21/5W LED Red

Quite simply these Philips brake/tail globe replacements are brilliant! I've tried all sorts of cheap LED alternatives but without question Philips have done it again. These are NOTICEABLY brighter than halogen bulbs. I cannot recommend them highly enough - once again Philips delivers. Very happy with the purchase.

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