Originally Posted by steiner711
How do you like your 3k HID fogs? I just put a set in my wife's Audi and am considering the same on my Summit. Can you tell a difference over the factory color in rain/fog conditions? Advantages?
If you live in an area that has a lot of fog (as I do), the 3K HIDs are awesome. They are considerably
brighter than the halogens, and there is less noticeable backscatter due to the longer wavelength of the light. It takes a while to get used to the color difference, but they work great in the fog.
Originally Posted by fun2drive
I would be concerned about pushing 3 times the light out of the fogs because the light spread and leakage will be significant. Nothing worse then seeing idiots using halogen housing pushing HIDs out of them blinding everyone.
I would expect that the 4300K to 6000K out HIDs will cause unwanted spread. I would like to see someone who has done this and see how good or bad the light through the fogs will be...
The design of these fog lamp enclosures is actually pretty good at minimizing any vertical light spread. The stock halogens are "masked" to prevent any direct light projecting from the bulb; if you replaced the bulbs with "unmasked" types, it would be like having your brights on to oncoming vehicles. The HID lamps only broadcast light to the sides (to the reflector) because of the way they are connected (end-to-end) to the harness.
This pic is really close to the garage door, and shows the demarcation between the fogs and the mains. On the open road, the fogs project directly out about 25 feet or so, then there is a 'penumbra' band of about 3 feet where there is bleed between the two lamps. At a few hundred yards out, the fogs are definitely noticable, but not as distracting to oncoming traffic as an unmasked halogen. I travel with my fogs on all the time, and have never been flashed by an oncoming vehicle.