PHILIPSautomotive lighting 11342XUWX2 X-tremeUltinon gen2 LED car Headlight Bulb (H4), 5.800K, Set of 2

These LED Headlight bulbs were to replace my Xenon HID Retrofits, the bulb and inverter quality on HID has become so unreliable i thought LED was worth trying.Boy was i glad i did, as to be expected with a brand like Phillips the build of the bulbs and drivers are very well constructed second to none.Provided you have space in the headlight housing they are quite simply to fit and they do fit very well and tight in the holders (Note - if you have a Canbus system you may need dedicated wiring or resistors to stop flickering or bulb out errors) I have made my own headlight loom I used for the HIDs and run relays for the lights so no issues.These bulbs give instant full light with no start up delay and an outstanding beam pattern both in width and length far superior to Halogen and even my Xenons, the light colour is pure white no Blue, and to be honest blue light on tarmac black roads is rubbish so these are perfect, driving at night is now a real pleasure.I do not expect any issues with MOT testers as to be honest they would have no idea they are led you cannot see the bulbs in the projector lights and the beam tests perfectly on a beam tester. Highly recommended

I installed the “previous iteration” 4000k bulbs in my Jaguar XF. They were difficult to install, but amazing - very bright. After 12 months, one of the led’s failed (fan was still spinning) - so much for the 12 year claim.I decided to try again with the new 6000k bulbs.I’m happy to report that they are noticeably brighter than the previous ones.“Classic Car LED’s” on e-bay have the correct adapter clips for the XF. There are TWO different types, one for dipped beam, and one for main beam. I used Loctite epoxy metal adhesive to glue the clips to the underside of the bulbs “header-ring”.Result is a very crisp white light that illuminates the road even better than the previous version (which was already pretty good).

Product was good, but when 2 sets broke, the warranty was useless. If these break, you won't get your money back or a replacement set. I have provided the proof of purchase and photos as philips requested but they are still not providing a replacement. I've reported them and let them know of this, yet they still won't help and just keep going in circles asking for different photos etc. Warranty is of no value whatsoever.

I have installed this set of Philips led bulbs to my Vauxhall Astra K. After trying other cheap brand's I must say that these are the most balanced Led bulbs you can find on the market. Bright but not too bright, the heatsink is so balanced, no vibration and no noise. Other cheap brand's they have too big of a led chip and produce too much heat until they blow up and the fan cannot help. Philips X-tremeultinon Led Gen2 are not expensiv for the quality you get.

These bulbs are expensive but they are very good! They are easy to install but they do have a bit of additional baggage at the back so make sure you have the space to fit them.As far as the light they emit — it’s excellent! I have them fitted to reflector lamps and they work really well. They are not a ball of light like what you get with cheaper bulbs.

I purchased these as a 'last ditch' attempt to get decent dipped beam illumination on my 2001 VW Passat which is fitted with projector lenses. I'd previously tried eBay 'cheapies' which, for £7, did a reasonable job, but they were still not as bright as I would have liked. So I bit the bullet and shelled-out £114 on these, the vastly more expensive alternative being to upgrade the car which I'm reluctant to do.The fan and heatsink unit is threaded to the main bulb body, however the mounting remains incompatible with the standard headlight, it having a proprietary connector into which the bulb should be inserted prior to that being engaged with the headlamp unit. As with the 'cheapies' I improvised a fixing using cable ties which seems to be OK. However, again as with the cheapies, the heat sink protrudes rearwards meaning that the rubber cap on the rear of the headlamp cannot be replaced. One further issue is that, unlike the cheapies, there is no mesh or other protection over the fan spinning on the back of the heatsink so any wires or whatever could potentially touch and stall the fan.I tested the bulbs on the bench prior to installation and they drew around 1.7A @ 13.8V: the cheapies drew 1.2A so I was expecting that the Philips items would be brighter and indeed they are. The question is, are they bright enough in my application? Well I would say yes, but only marginally. Coming around the M42 on a dark and rainy night, the light from cars behind me still shows brighter on the road ahead than my own lights. How much of this is due to the bulbs and how much is due to the notoriously poor Passat B5.5 headlights I cannot say. The bottom line is that I will stick with them for now.OK now to the most unexpected bit. As installed in the Passat the bulbs produce a radio frequency emission. I don't know whether this emission is conducted (i.e. down the wires) or radiated (i.e. into free space). One consequence of this is that if I'm in a lower signal area - which I am, most of the time - the generally poor by modern standards Gamma radio on the Passat is swamped with interference when on FM. Turn the headlights off and all is fine, but back on again and all I get is mush. I have contacted Philips about this and the following is an extract from their reply: "This is a known issue that some 11972XUWX2 gen 2 are experiencing, and we currently don't have a viable solution for this model." They then offered me gen 1 (as opposed to gen2 which these are) bulbs as a replacement. I've gone back to them again to say that I don't want to go to an earlier technology but want the current bulbs without radio frequency interference. As yet they have not responded. I know something of electronics and EMC and this problem seems strange to me. I can only assume that within the bulb lies an active current limiter of some description probably using switching technology but which has not been designed to be EMC compliant. For an electronics giant such as Philips this is, in my view, reckless. I'm going to investigate more and I may try to filter the interference out. Either way, based upon Philips' claim for the product, their reputation and the extremely high price, no way should this be necessary.Update Feb 2021: after much further investigation on the bench, such as fitting ferrite chokes etc. I contacted Philips again for assistance. They provided me with some high capacity clip-on ferrites which I tried with the bulb installed in the car. However, like others I tried, these ferrites were audibly saturating - they were actually vibrating so much RF was being absorbed - and the improvement on radio reception was minimal. I produced a video of this phenomenon and sent it to Lumileds and ultimately an alternative replacement product was received. However, here's the most important takeaway from this whole experience. You may recall that I was trying to improve the projector dipped headlights of my 2001 VW Passat? Well I found a YouTube video explaining that degradation of projector headlamps over time is primarily due to degradation of the reflector surface within the headlamp unit itself. So I 'bit the bullet' and replaced both headlight units with OE Hella units. Result: acceptable visibility with the regular H7 halogen bulbs. So I didn't need the LED upgrade at all!! I will ultimately fit the replacement LED bulbs but, the benefit may well be secondary. Hope this helps.

Well made. Works fine without canbus adapters but you will get the bulb error only when you first start the car, if you can live with this dont buy the canbus adapters.I have the canbus adapters and they work fine no bulb errors.Also no radio interference or flickering with or without the canbus adapters.Great colour ice white not blue.