OSRAM XENARC Cool Blue Boost D1S, HID headlamp, 66140CBB-HCB, hyper blue light, 85V, 35W, offroad-only, duobox (2 lamps)

I've went through various HID models between Philips and Osram, both German, and both excellent products; but for the D1S versions my X5 Retro-M needed, the Osram Cool Blue BOOST won out, after countless hours comparing brightness readings, warmth (Kelvin) and so forth. These are shown as "OFF ROAD ONLY" because of the strict limitations they have yet to approve for European use with this whiter color, even though the actual brightness is "technically" about 10% less than their more expensive NIGHT BREAKER LASER version, but about 10% brighter than the Osram's Cool Blue INTENSE. The Cool Blue Intense is about 10% brighter and 10% whiter than BMW's excellent OEM part, which is about 4500K, and better than most OEM lamps for other cars. Having said all this, their is a HUMAN factor to what we perceive that makes the brightness and color ratings offset each other from one bulb to another, and that's where the Cool Blue BOOST excel. A 10% lower lumen rating (brightness) on a 20% whiter bulb (Kelvin) will have the human eye effect of being much brighter, and much clearer, in most cases. Their true Kelvin temperature is about 6500K, and increases maybe 300 after breaking in (20 to 30 hours of use). The human eye can't see this; nor can the human eye see the 10% deficiency of brightness compared to the most powerful Night Breaker Lasers, because they're running at roughly 4500K; and this warmer temperature color (more red spectrum) is part of the increased brightness. But the human eye likes DAYLIGHT brightness, and that is around 5500K at high noon. (Early morning and later afternoon is more like 4000K or lower.) So don't get hung up on "brightness" ratings (Lumen numbers); they're misleading for a number of factors; but there are several real good videos of sales teams testing all these top performers. The HUMAN EYE likes WHITE LIGHT, and the colors on the road at night jump out at you with the Cool Blue BOOST lamps, better than any other. There is some truth to the argument that lower temperature lamps make driving in snow and heavy rain easier to penetrate, because (theoretically) the lower temperature lamps (4200-4800K) don't bounce off particles like brighter white colors do. But that too is human eye perception; and you might like the softer amber shade of lower temperatures. If so, then the best on the block (for now, October 2019) is the Night Breaker Laser. But, if like me, you want a pure white, powerful long range color rich driving experience with a European look for bystanders, then the Cool Blue BOOST is the best choice. The fact that it is "outlawed" abroad makes it even more appealing! WARNING: Watch out for the WAY and WHO you order whatever you get. ONLY buy in FACTORY SEALED PAIRS. It is important with HIDs to get "production lots" matched, and not replacing one bulb at a time, or buying "two packaged" bulbs, where you're getting two SINGLE bulbs. One can be two years on a shelf longer than the other, and have an obvious color shade difference (if that bothers you, as with me). Secondly, RETURN any TWIN BOX that has had the seal broken. The attached photo may not show it, but this seal had been carefully broken and resealed. A buyer in a hurry would open this without noticing it, and maybe wind up with someone else's rejection while paying NEW price. I can't blame the seller or Amazon, but one of my orders was recycled. Lastly, AMAZON has a habit of shipping these GLASS products, well packaged by Osram or not, in an ENVELOPE, which risks even more that the seal will be broken, or worse. So inspect closely before you keep!

fits perfect well

Purchased for my 2014 BMW 535iX LCI. Bulbs were sealed correctly. Verified authenticity with Osram Authenticator online. No issues with fitment. Very impressed with performance. Love the white color. Great coverage. My photo is unedited, and was taken with an iPhone 15 Pro. Would recommend Seller Retrofitlab. Fast Prime Shipping! Thank you Amazon!

I just installed these bulbs today and haven't seen them at night yet, but expect they will be fantastic. I had one bulb burned out, so replaced that one first to compare with the other still working bulb. It seemed much brighter (though both still blinded me.) Upon initial start-up they do appear blue/purple-ish and then settle to a very nice white that can be see on the clear headlight housing but still has that 6000K-ish color that I had previously.As soon as I received the bulbs, I went to the OSRAM site and verified the number on the unbroken seal and the two bulb numbers returned matched what was in the package. So I was comfortable proceeding with all the work to remove the front bumper to get the headlight housing out in order to change.The price was very reasonable compared to other sites that wanted over $200 USD for the same set. As long as they are legit, which they appear to be, it's a great deal.I'll update again once I've had a chance to see them at night.

Lights look well made high quality but is not as bright as advertised LED is much more brighter but these last longer and don’t give off any error codes 4 stars because of brightness I would still highly recommend this item

These cbb bulbs are a huge upgrade over the morrimoto Xb d1s I had on my bmw light out put is second to none in the 5500 kelvin rangeThey say 7000k which I believe osram uses to rate there intensity vs the color rang most people think Kelvin ratings is it’s lumens but it’s the color osram rates it based on that 7000k would be a extremely blue light but these are pure led like white light extremely satisfied with this purchase don’t hesitate these are authentic bulbs you can use osram trust appAnd for the price it can’t be beat imagine a osram cbi with 5 times the brightness that’s a cbb bulb matches my aftermarket bav group angle eyes perfectly

I drive Big Truck and majority of my traveling is through the night. when purchased the truck years ago i went through couple of different aftermarket brands not spending more than $60 dollars on pair of HID bulbs.. but now I chose to go and spend the money.. I like top brand companies.. but i think thats what you paying for is the name.. there was nothing wrong with the bulbs i had for past year and I regularly change them every year if they good or not... since they are on 5 nights per week after a year i think they had enough... soooo... I spend $150 compared to a $30 dollar ones i had past two years....There IS Absolutely no difference in in Brightness or light pattern... the color might be little bit more bluishBut hey these are called cool blue.. :)SO for those of you That are interested in buying some Pricey bulbs i would go withTorchbeam D1S HIDHad them for two years they are $30 bucks per set... and if they survive on a semi 5 nights a week7-8 hours per each trip for a year.. i think they are worth $30 bucks..The one star is not to put bad name to this product... its just to grab attention of others...The product itself is Awesome and I would never say anything bad about the company.This is just what I experienced and wanted to share...