Cadillac STS Forum - 2005 through 2012 Discussion, I got a question about fog lights in Past Cadillac Vehicle Discussion; Originally Posted by MoistCabbage
DO NOT put HIDs in the fog light assemblies. They're designed to disperse the light from ...
DO NOT put HIDs in the fog light assemblies. They're designed to disperse the light from a relatively low output, incandescent bulb, at a wide angle. Installing HIDs will just cause a lot of glare for anyone driving near you.
Not sure on bulb number. Check your owners manual, or look on the bulb itself. You can get a slightly brighter incandescent bulb, that comes very close to factory HID color temperature.
Generally speaking, you are right, but in this case, no.
They are designed to disperse light from a somewhat low output source, but that doesn't mean that swapping a 55w kit is going to blind anyone.
The housings are only slightly reflective. The projector-type lens also reduces reflection. I ran a 55w 6000k vvme kit with no modification to the fog light housing and even at full output, they are not aimed in a way where oncoming drivers are getting hit right in the face with glare nor are they any brighter than the OEM HID headlights.
I've since sanded the inside of the fog light housings and painted them gloss black. This has focused the output quite a bit, but still not even close to being high enough for the arc to touch an oncoming driver even if he's in a lambo. Even at that, they are nowhere close to the scattered blinding shit that was the result of my moron neighbor putting HID lights in his (halogen reflective housing) Silverado.
Also, for the ones who said that I have to take the front bumper to access the fog light assembly. I didn't have to, all I did was undo the underbody panels and had access. Other than that, mission complete. On to the rear door panel I dive in to.