OSRAM XENARC COOL BLUE INTENSE D3S HID Xenon discharge bulb, discharge lamp, 66340CBI-HCB, duobox (2 units)

I decided to change the bulbs in my Range Rover which is ten years old now and has Bi-Xenon headlamps. These bulbs do deteriorate over time and they can cause an extra load on the ballast in order to ignite them and ballasts are expensive to replace so I decided to pre-empt a failure and also improve my lighting by swapping them out. They're dead easy to change, all I had to do on my car was open the portal on the rear of the headlight assembly, twist the bulb 1/4 turn and pull it out. Unplug the electrical connector and then reverse the procedure to refit. Make sure the ignition and headlights are off!! These use 25,000v to ignite and 80v to operate and that will give you a hell of a belt. As you can see from my pictures I changed the nearside first and the headlight is a lot brighter (ignore the aux main beam bulb - the inner one) You can see on the beam pattern the hotspot on the nearside lamp is much more intense which is what you need. The third photo is the difference between the old Philips bulb (left) and the new Osram one (right). The Philips has started to go opaque.

Excellent bulb! Some reviews complaining it’s not blue and not that amazing but you need to wait for xenon bulbs to ‘burn in’ and they will increase in brightness after a week or two of regular use. It emits a lovely cool white light with a hint of blue after this time, these are a noticeable upgrade from standard and well worth the money as some places like euro car parts sell these for £180!! A definite worth while purchase if your looking for an upgrade with your lighting you won’t be disappointed.

Had a bulb go in my 2012 Audi A6 . Replaced both fronts and these are so much brighter than the originals. They've certainly made a difference to my night driving! No, they are not the brightest on the market, but they are certainly bright enough and as such good value foe money.

These are really good for light tell the difference straight away from my last pair. Only slight con I have is that it mentions cool blue. Which their not really. A mix between yellow and ice white. I expected like an LED cool white/blue. They are neither. But overall a great product for visability.

Cool crisp white light. Far better than the O.E.M. bulbs. Some people on here moaning they are not [Blue enough] If you want blue go for the Cool Blue Boost, as these Cool Blue Intense only have a hint of blue. They match my LED's perfectly.

they are are a big improvement on the oem bulbs

Very satisfied, however not massively different from the original Philips bulbs. The light percentage increase stated by Osram is complete BS. With that said, they are better so it's a no brained purchase over the oem bulbs.

They really shine very well and there is a big difference. I would recommend!