HID FOGS...B4 & AFTER
#1
Rennlist Member
Thread Starter
HID FOGS...B4 & AFTER
Finally took the time to instal my HID fogs from DDM tuning.
Simple instal...Here is the how to thread.
https://rennlist.com/forums/993-foru...-fog-test.html
Before and after is great...especially if you have HID headlights...dim yellow fogs just do not cut it...the matching color and brightness now bring the car up to a clean and modern look...not to mention the great light.
Make sure you take the time to clean out the inside of the fog lenses...mine were filthy (some dis-assembly required but not difficult)...aim and shoot.
Simple instal...Here is the how to thread.
https://rennlist.com/forums/993-foru...-fog-test.html
Before and after is great...especially if you have HID headlights...dim yellow fogs just do not cut it...the matching color and brightness now bring the car up to a clean and modern look...not to mention the great light.
Make sure you take the time to clean out the inside of the fog lenses...mine were filthy (some dis-assembly required but not difficult)...aim and shoot.
#3
Nordschleife Master
BTW, I was just "in there" today doing an LED bulb swap on the positioning lights (another big improvement in lighting color) and noticed that the double sided tape scheme for attaching the ballast/ignitors to the frame totally FAILED on both sides. Next time I have access to a lift I'm gonna pull the corner valances and re-do the attachment in some other way.
#4
Rennlist Member
Thread Starter
There is a space above the bumper. When you remove the foglight fixture you can reach in (palm up) and your fingers will go into a space. Wrap your fingers around the edge so that your fingertips are essentially above the space occupied by the foglight fixture. I cleaned this as good as I could with simple green and double sticked the ballast up there. Thanks for your initial DIY JPP...forgot to give credit!
#5
Nordschleife Master
Here are a few DIY photos of my HID Hella DE fog light installation ... easy with the bumper off ...
#7
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Looks great! But, from a functional perspective, shouldn't fogs be yellow-ish? I always understood a white light just lit up the fog vs. yellow projecting through it. I know this may be more style vs. function, but living near a sometimes very foggy coast I've opted to stay with the non-HID fogs. Just curious...
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#8
Rennlist Member
Thread Starter
Yes, that is true. The "yellowish" tint of the stock lights do not really qualify as yellow fog-cutting lights. For that you would need yellow lenses. I tend to use these as driving lights...I like the way they light up the road close to the car while the headlights do the work farther out.
Ironically, on my first nightime test drive with my new lights, it was indeed, foggy. Luckily, I was prepared!
Ironically, on my first nightime test drive with my new lights, it was indeed, foggy. Luckily, I was prepared!
#9
Nordschleife Master
There is a space above the bumper. When you remove the foglight fixture you can reach in (palm up) and your fingers will go into a space. Wrap your fingers around the edge so that your fingertips are essentially above the space occupied by the foglight fixture. I cleaned this as good as I could with simple green and double sticked the ballast up there. Thanks for your initial DIY JPP...forgot to give credit!
Both of those solutions sound easy and MUCH better than the one I chose Thanks for the tips, guy's, I'll be revisiting the beast today.
#10
I just did the DDM HID fogs last week, and found that the fog bulbs were quite a bit too long for the housings, and it was very difficult to snap the foglight rear covers back on. The back end of the bulbs was sticking well up through the hole you have to drill in the covers, and really straining the wiring grommet. Did you guys have the same experience, or did they send me the wrong bulbs?
#11
Rennlist Member
Thread Starter
I just did the DDM HID fogs last week, and found that the fog bulbs were quite a bit too long for the housings, and it was very difficult to snap the foglight rear covers back on. The back end of the bulbs was sticking well up through the hole you have to drill in the covers, and really straining the wiring grommet. Did you guys have the same experience, or did they send me the wrong bulbs?
I think it should be ok even though there may be some undesireable pushing on the wires inside.
#12
Nordschleife Master
Looks great! But, from a functional perspective, shouldn't fogs be yellow-ish? I always understood a white light just lit up the fog vs. yellow projecting through it. I know this may be more style vs. function, but living near a sometimes very foggy coast I've opted to stay with the non-HID fogs. Just curious...
#13
Three Wheelin'
shouldn't fogs be yellow-ish? I always understood a white light just lit up the fog vs. yellow projecting through it. I know this may be more style vs. function, but living near a sometimes very foggy coast I've opted to stay with the non-HID fogs.
#14
Nordschleife Master
Yes, that is true. The "yellowish" tint of the stock lights do not really qualify as yellow fog-cutting lights. For that you would need yellow lenses. I tend to use these as driving lights...I like the way they light up the road close to the car while the headlights do the work farther out.
Fog lights are supposed to be low and wide and preferrably yellow so they penetrate the fog (marginally) better. Using HIDs as fogs isn't a great idea IMHO but if you're going to use them as driving lights that's a differnt story - just be carefull not to blind oncoming drivers.
Fog is made up of water droplets which reflect light back at you like a mirror. It's the angle and height of the fog lights that allows them to throw light under the fog layer that determines how effective they are. If the light is reflected under the fog layer, the brighter, the better. In the past, it was thought that yellow light would "penetrate" the fog, but the yellow tint just reduced the amount of light being reflected back at the driver and didn't improve illumination. Our well designed foglight housings are mounted low and the reflectors are 'half-lidded' and angled downwards to project the light under the fog layer. Driving lights, on the other hand, have no 'lids' and their reflectors are angled straight out in front to extend and widen visibility. My experience driving in fog with the HID's installed has been excellent so far. As long as the fog is hovering slightly above the road, they work very well. Here's a 'webquote' on the subject:
From "How Do Foglights Work? by Steve Smith"
"Angling for Better Vision
The idea behind fog lights is to reduce the amount of glare thrown back at you. The fog lights are angled downward toward the road at an angle, so when you turn them on, the light is thrown across the road in front of you and not straight ahead of you, where it can be reflected back. The light is not reflected back into their eyes. This gives you some visibility of the roadway, without blinding you. The color of the lights has no bearing on their use in fog. Today, yellow or any other color is not recognized as being "better" at penetrating fog. It may have more use as a safety mechanism for oncoming traffic."
#15
Three Wheelin'
JPP, good info. I'm not surprised about the yellow not doing much - it's a little like wearing yellow shooting glasses, I suspect the "benefit" is as much pyschological as real improvement. My reluctance to use HIDs in fogs stems largely from there being too much light. Unless the light projects almost entirely under the fog then the water vapor will refract/reflect the brighter light producing more glare and ultimately making it harder to see. Based on where you live I'm sure you know about driving in real fog so you know what it can be like. I guess HID fogs come down to a trade-off, better light if the fog is off the road and more glare if it's on the road. To me the added glare is the greater evil but YMMV.