Good product. Installation is the same as for a conventional replacement headlight bulb. I had to take a sharp utility blade, shave and score a small piece of the factory plastic on the back of the headlight assembly to match the diameter of the new bulb. never mind The LED bulb is slightly wider and deeper (longer) than a regular replacement halogen bulb due to the built-in fan. It was easy and I had no problem making changes - it might have been my application - I have a 2005 Lincoln LS so I'm betting it's not high volume sales for this model. A note: I used H11 LED bulbs. in the fog lights and they didn't work. I tried swapping the wires, it's easy (it's universal, just unplug and swap - there was no key), but it didn't work. So I sent that back to Revane. The clarity of the light is amazing! Even with slightly tightened lenses, it goes through and gives you a much better view at night. At least 40% better coverage. When you put them on for the first time, you may think that you are blinding other people, and it is possible. I recommend installing the bulbs and then driving at night, but have a friend use this car as well and drive in opposite directions so your friend can see your headlights and give their opinion on how they are aligned. Or you drive your friends car and let them drive your car with new headlights. Adjust as needed. Mine were good and didn't need any adjustments. hope this helps you
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