Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)


Improve the light and style of your car's interior with Philips' new X-tremeUltinon LED bulbs. Long-lasting design, eye-friendly daylight effect.

Why buy Philips X-treme Ultinon LED Festoon C5W 30mm 4000K (Single)?

If you’re looking to improve both the lighting and style of your vehicle’s interior, try Philips’ new X-treme Ultinon LED bulbs. Unlike some technologically inferior LED bulbs that are on the market these days, Philips X-treme Ultinon LED bulbs produce a warm, natural-feeling and uniformly diffused light, so you can enjoy a heightened illumination that doesn’t damage or tire your eyes. What’s more, X-treme Ultinon bulbs offer an extremely durable bulb that can withstand high temperatures as well as vibrational damage as a result of a technologically innovative casing, achieving a remarkably long life of up to 12 years.

Made to the highest quality of Philips Automotive-Grade Quality standards, the new X-treme Ultinon bulbs offer the very best in lighting design, guaranteeing you an easy installation and a powerful, precise light beam performance. Give your vehicle some extra comfort, some extra style and some extra light – for years to come.

(The usage of these bulbs in an exterior application is not road-legal and, in addition, may trigger a bulb error message to appear on the vehicle's on-board computer system / dashboard. This 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 Philips CANbus control unit.)

Features and benefits

  • 4000K LED lighting
  • Vastly improves interior lighting
  • Warm white light
  • Sensitive to eyes
  • Exceptional style
  • Durable LED design for extremely long life – up to 12 years
  • Innovative casing prevents heat and vibrational damage
  • Built to Philips Automotive-Grade Quality high production standards
  • Not road legal – off-road applications 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 come 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.


Number of Bulbs1
Bulb TypeStyling
Road LegalNo
Light Improvement
Kelvin Rating4000K

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: £16.99 You save £2.00

£ 14.99

4.9 Based on 15 customer reviews


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Customer Reviews

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

54000k 30mm festoon

Pure white light . Better light output than the 6000k in my opinion . Very nice upgrade to interior .

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

4Significant improvement

Considerably better than the original fitment. Maybe a little expensive.

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Initial error

Purchased this 30mm long festoon for front interior courtesy lamp not realising festoons are available in different lengths. Subsequently purchased correct size, and having not opened this (size difference obvious when comppared to original) returned this and money refunded. Correct length works a treat. Much brighter and whiter than original incandescent bulb,

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)


Nice fit and colour for my car.

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Warm white better than cool white

I prefer warm white personally ,I have tried both of them but warm white doesn't effect eyes at night and they are way brighter than osram led or company fitted filament one

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)


It exceeded my expectations Very good and stylish

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Exactly what I was looking for!

I had another LED festoon from a major manufacturer. It was a fine bulb but had a blueish 6000k tint to it that didn’t match the other LED’s my car came with. The light wasn’t one directional either which I wanted because I have one bulb on the side of my cargo area. This was the perfect bulb I had been looking high and low for until I found it at Powerbulbs. They were fantastic! Shipped extremely fast! Shipping takes around a week since I’m the US but that’s to be expected. Small price to pay to get the bulb you want. Will definitely use again for my bulb needs! Thanks!

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)


Bright doom led replacement!

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Really good !

It might be quite expensive but its worth it. First got one, then came back for two more. Nice strong light, perfect to use to read text in the evening. It brights up the whole car interior.

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Philips 4000K 30mm C5W L.e.d

①Provide soft & comfort view ②4000K l.e.d finds "rare" in North America ④Outstand the rest with luxury feel

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Nissan Dualis +2

Fits well in my car, clean and bright. Easy on the eyes and makes bright up the interior room with class.

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Much Brighter

Put in boot and rear seats - much brighter - actually lights up the boot compared to the original. Is a nice white light, more neutral than toward the blue end, which isn't maybe as stylish, but more practical.

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Great LED

I remember this as white in my car, maybe a little warm. But it has a great color temp. and is bright. I recommend it,

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)

5Interior light improvement

The only LED that assure quality are made from Philips or Osram. In this particular case, only Philips make 31mm festoon LED replacement, and very satisfied with light output and tone (4000K). Would like to pay less, as LED is becoming more and more "standard", mas prices still remain high. Powerbulbs, does make an effort, and has some discount, from now and then. Great service and fast delivery.

Philips X-treme Ultinon LED Festoon C5W 4000K 30mm (Single)


Awesome service by power bulb. Bought this 30mm size after I bought the wrong size from Osram ( it doesn't Indicate the size, unlike Philips ) and got a full refund after I mail it back to power bulb. Great service. Great product too. But, I prefer to have the Osram type led with the correct size but too bad it does not come with 30mm.

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