HID kit in front fog lights?



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I think there may be some confusion on the purpose versus the definition i.e. Fog Lights vs Driving/Running lights. My setup is for driving, also from the research that I've done the reason manufactures go with 4300K is because at that Kelvin or Color Temperature it is supposed to be the best for Luminance / output where I've never heard of any reference to the reason having to do with glare or eye fatigue. Personally in my experience, I think my 6000K HID has better Luminance than the HID 4300K. In Japan I've never driven in fog weather conditions so I'm not sure what those effects might have been. I just wanted to share my experience with H.I.D Fogs/Driving Lights that I've been playing around with a couple of configurations for the past 5 years and would have to say that the projectors work best.
http://www.piaa.co.jp/english/conten...IAA_Europe.pdf
http://www.piaa.co.jp/english/conten...IAA_Europe.pdf
Bro, you need to chill and slow your roll. I never assumed you were attacking me....smh I just wanted to clarify that there is a difference between application of Fog Lights and Driving Lights where your post suggested you were more talking about Fog Lights as the application. My setup is for Driving Lights not Fog Lights. My assumption that you were talking more of Fog Light application is because you cross-referenced it with the rear tail fog lights.
I'm putting out information based on my experience of what I've been through over the past 7 years of changes to my ride where there are few that have customized their CLKs to the extent that I have. I always do thorough research and definitely don't rely on one source of information. I remember when research suggested that 20" rims wouldn't fit on our rides...smh
Anyways I've had 4300K as OE and in my experience I see allot better when I switched out to 5000K and even better with 6000K where highways in Japan for the most part have no street lights where when I say see better I'm talking about the road and road signs. It's also possible that road signs use different material and reflective material across the different countries which may also have a considerable impact. You also have to remember that you will see slight to significant differences in (K)elvin/Color Temperature across the different manufactures, that's because the standard is not enforced.
I've ran PIA in the beginning, was more impressed with aftermarket Chinese products. Now that I've moved back to the US after 23 years in Japan, once I get my car imported I will see how my 6000K applies i.e. from road signs to the road itself. I'm out here in the desert with pitch black roads so it will be interesting to see.

The information I put out here is "Big Picture", not addressed specifically to you but for everyone. Funny you mentioned the word safe though, kind of defeats the purpose of customizing or making any changed to the vehicle for that matter...lol Also funny you mentioned Legal as if 4300K is the only thing legal....smh
Last thing that I found interesting from your PDF Catalogue you posted is
1. It's from PIA Japan Website
2. For a 2009 European Catalogue.
BUT WAIT There's More - According to my research
PIAA sells a 6600K HID which they state is "Highest Rated kelvin on the Market"
I do my research...
Last edited by Williams707; Nov 30, 2013 at 02:15 PM.
I know facts are boring.... Sorry, My point is not to get personal here. I've very clearly stated that I run Illegal equipment, and I don't recommend it, but that we are purely talking about aesthetics at this point, and not increased light efficiency, optics, light reflection, etc.
If you dig deeper you will also find that the higher up the Kelvin scale, the more light triggers dilation in the human eye, which then lets in much more ambient, reflective light and opens the eye to glare... This works through the Scotopic curve, higher Kelvin ratings correlate to higher frequencies on the Scotopic curve, the human eye reacts by dilating, therefore letting in more light giving the appearance of brighter light with the higher Kelvin rating... In the end though, larger dilation will let in more ambient, and reflective light causing eye fatigue. Here you can see:

It's also interesting you mention Chinese products, again, here's where it goes a bit wrong. To achieve higher Kelvin ratings without painting the bulb surface, certain elements must be present in the bulb, since they operate higher on the Scotopic Curve, they operate at a higher frequency, the UV rays caused by this need to be protected by a UV coating, which isn't present on the cheaper bulbs, which in tern can deteriorate the headlamp lens from the inside, as well as adversely affect the reflective coating on the lamp housing. I have a friend with a new Explorer, that, with Cheap HID's in it, had the reflective material start flaking off of the inside of the housing, but I digress....
Most of what I'm saying IS "Big Picture" for the majority here, from a technical standpoint, not from my mods and what I think looks cool on my car, in fact I've stated multiple times that what I'm running is not optimum for lighting performance, rather it's for personal aesthetics.
Nitty Gritty: FOG: What is it? Well, Merriam-Webster defines it as: vapor condensed to fine particles of water suspended in the lower atmosphere that differs from cloud only in being near the ground. I think we can all accept this as a decent definition. Water, is reflective, this is second grade stuff, but you can fill a cup right now with water, shine a flashlight directly on the top and get reflection. So, the fine particles in fog, are also reflective. Here comes the Scotopic Curve again to tie it all in.... When you introduce light to fog, a certain amount will reflect back, this is why fog lamps have a low, wide pattern. Standard Halogen Fog Lamps are below 4100K, give or take, the reason you don't see ANY OEM MANUFACTURE use HID's in fog lamps is because of the fatigue, based on reflectivity, based on the Scotopic scale, that the driver would be subject too. It doesn't have to do with money, as most auto manufactures spend tons more getting their stupid LED eyebrows to match their HID's perfectly. Mercedes, BMW, what have you could easily tack on $250 to the price of a 7-series, or Mercedes S-Class to have fogs that match the headlamps..... But they don't, and that's down to rules, based on driver safety of the "Big Picture" you referred to. Now, I know you swapped your fog lights for driving lights, but big picture is that the OP was talking about fog lights, specifically, the factory ones.
Again though, these are just the pesky facts, run what you want, what you think looks cool, whatever... It's all good.... Just don't go telling people that things are what they aren't. What you're running wouldn't pass a certified light inspection in CA, and probably not a safety inspection in any most other states, nor would mine... Does it look cool, sure... Is it optimum for the human eye.... Nope.
I'm sure you're going to respond with something containing emoticons and Txt/chatspeek, but this is where I bow out. I've provided ample facts to support the argument, and, myself, the DOT, and the Universities of whom provided the studies for the Scotopic Curve, and they may be wrong. Who knows, Camels were the cigarette your doctor smoked in the 50's.
I'm putting out information based on my experience of what I've been through over the past 7 years of changes to my ride where there are few that have customized their CLKs to the extent that I have. I always do thorough research and definitely don't rely on one source of information. I remember when research suggested that 20" rims wouldn't fit on our rides...smh
Anyways I've had 4300K as OE and in my experience I see allot better when I switched out to 5000K and even better with 6000K where highways in Japan for the most part have no street lights where when I say see better I'm talking about the road and road signs. It's also possible that road signs use different material and reflective material across the different countries which may also have a considerable impact. You also have to remember that you will see slight to significant differences in (K)elvin/Color Temperature across the different manufactures, that's because the standard is not enforced.
I've ran PIA in the beginning, was more impressed with aftermarket Chinese products. Now that I've moved back to the US after 23 years in Japan, once I get my car imported I will see how my 6000K applies i.e. from road signs to the road itself. I'm out here in the desert with pitch black roads so it will be interesting to see.

The information I put out here is "Big Picture", not addressed specifically to you but for everyone. Funny you mentioned the word safe though, kind of defeats the purpose of customizing or making any changed to the vehicle for that matter...lol Also funny you mentioned Legal as if 4300K is the only thing legal....smh
Last thing that I found interesting from your PDF Catalogue you posted is
1. It's from PIA Japan Website
2. For a 2009 European Catalogue.
BUT WAIT There's More - According to my research
PIAA sells a 6600K HID which they state is "Highest Rated kelvin on the Market"
I do my research...


1. My 6000K H.I.Ds made in China are closer to being white than they are to being blue. Which is why I said the standards of Kelvin are not enforced.
2. You say going with a Chinese brand is a problem when mostly everything in America is made in China and many JDM products sold in the US are actually parts made in China. I've never had any problems with my Chinese H.I.Ds that I purchased in Japan flaking off. In my experience of what I've seen is the US goes with a cheaper/lower quality Chinese products versus the products that the Japanese chooses to buy and sell from China.
3. What's legal and illegal is State by State and Country by Country and as I said my setup was legal in Japan. Big picture is understanding that not everyone on this forum lives in the United States. With CA having the strictest regulations, there's allot of things that is illegal in CA than in other states...smh
4. Wonder what VIPclk320 (Ash) has to say about the statement "you can't modify the lighting system from stock in any way" seeing that he lives in CA and has modified everything on his ride.
5. I get what you are saying technically, I already know and have read those things in the past. What I'm saying is having to strain your eyes to see on the roads that I've driven using 4100K-5000K versus seeing allot better with 6000K which maybe due to Japan using different materials and colors for their road signs i.e. Japan uses Blue & White versus Green & White. So you have to take that into consideration when you talk about frequencies. Also Dr Who, is the frequency affect the same on color blind people? What about eye sight?
6. I haven't been modifying cars for a long time. I've only been modifying my CLK for the past 7 years. My car is pretty much done. There is only 4 things left that could possibly be done to my car which would be SC, LSD, CF Driveshaft, Stereo, and/or go wide with a 9.5/11j setup.
7. Fog Lights and Driving Lights are different applications. Not talking about Headlights. My application on my projector H.I.D.s is used as Driving Lights, not Fog Lights as you will see the difference below. I wanted to make sure everyone is clear on the distinction as you correlated the rear fogs to the front fogs. As long as you get my point then I've effectively communicated be it with the use of emoticons, articulation, chat lingo, or what ever!!!


I know facts are boring.... Sorry, My point is not to get personal here. I've very clearly stated that I run Illegal equipment, and I don't recommend it, but that we are purely talking about aesthetics at this point, and not increased light efficiency, optics, light reflection, etc.
If you dig deeper you will also find that the higher up the Kelvin scale, the more light triggers dilation in the human eye, which then lets in much more ambient, reflective light and opens the eye to glare... This works through the Scotopic curve, higher Kelvin ratings correlate to higher frequencies on the Scotopic curve, the human eye reacts by dilating, therefore letting in more light giving the appearance of brighter light with the higher Kelvin rating... In the end though, larger dilation will let in more ambient, and reflective light causing eye fatigue. Here you can see:

It's also interesting you mention Chinese products, again, here's where it goes a bit wrong. To achieve higher Kelvin ratings without painting the bulb surface, certain elements must be present in the bulb, since they operate higher on the Scotopic Curve, they operate at a higher frequency, the UV rays caused by this need to be protected by a UV coating, which isn't present on the cheaper bulbs, which in tern can deteriorate the headlamp lens from the inside, as well as adversely affect the reflective coating on the lamp housing. I have a friend with a new Explorer, that, with Cheap HID's in it, had the reflective material start flaking off of the inside of the housing, but I digress....
Most of what I'm saying IS "Big Picture" for the majority here, from a technical standpoint, not from my mods and what I think looks cool on my car, in fact I've stated multiple times that what I'm running is not optimum for lighting performance, rather it's for personal aesthetics.
Nitty Gritty: FOG: What is it? Well, Merriam-Webster defines it as: vapor condensed to fine particles of water suspended in the lower atmosphere that differs from cloud only in being near the ground. I think we can all accept this as a decent definition. Water, is reflective, this is second grade stuff, but you can fill a cup right now with water, shine a flashlight directly on the top and get reflection. So, the fine particles in fog, are also reflective. Here comes the Scotopic Curve again to tie it all in.... When you introduce light to fog, a certain amount will reflect back, this is why fog lamps have a low, wide pattern. Standard Halogen Fog Lamps are below 4100K, give or take, the reason you don't see ANY OEM MANUFACTURE use HID's in fog lamps is because of the fatigue, based on reflectivity, based on the Scotopic scale, that the driver would be subject too. It doesn't have to do with money, as most auto manufactures spend tons more getting their stupid LED eyebrows to match their HID's perfectly. Mercedes, BMW, what have you could easily tack on $250 to the price of a 7-series, or Mercedes S-Class to have fogs that match the headlamps..... But they don't, and that's down to rules, based on driver safety of the "Big Picture" you referred to. Now, I know you swapped your fog lights for driving lights, but big picture is that the OP was talking about fog lights, specifically, the factory ones.
Again though, these are just the pesky facts, run what you want, what you think looks cool, whatever... It's all good.... Just don't go telling people that things are what they aren't. What you're running wouldn't pass a certified light inspection in CA, and probably not a safety inspection in any most other states, nor would mine... Does it look cool, sure... Is it optimum for the human eye.... Nope.
I'm sure you're going to respond with something containing emoticons and Txt/chatspeek, but this is where I bow out. I've provided ample facts to support the argument, and, myself, the DOT, and the Universities of whom provided the studies for the Scotopic Curve, and they may be wrong. Who knows, Camels were the cigarette your doctor smoked in the 50's.
Last edited by Williams707; Nov 30, 2013 at 07:35 PM.
V C Section 26101 Modification of Vehicle Equipment
Modification of Vehicle Equipment
26101. (a) A person shall not sell or offer for sale for use upon or as part of the equipment of a vehicle any device that is intended to modify the original design or performance of any lighting equipment, safety glazing material, or other device, unless the modifying device meets the provisions of Section 26104.
(b) A person shall not use upon a vehicle, and a person shall not drive a vehicle upon a highway that has installed a device that is intended to modify the original design or performance of a lighting, safety glazing material, or other device, unless the modifying device complies with Section 26104.
(c) This section does not apply to a taillamp or stop lamp in use on or prior to December 1, 1935, or to lamps installed on authorized emergency vehicles.
Amended Sec. 45, Ch. 491, Stats. 2010. Effective January 1, 2011.
Per: http://www.dmv.ca.gov/pubs/vctop/d12/vc26101.htm I guess thier facts are Wack too, ya?
Oh, ya, here's a little something on cheap Chinese HID kits:
http://www.cbp.gov/archived/xp/cgov/...011_2.xml.html
But, US Customs must be Wack and just flexing their muscles too I guess...

1. My 6000K H.I.Ds made in China are closer to being white than they are to being blue.
2. You say going with a Chinese brand is a problem when mostly everything in America is made in China and many JDM products sold in the US are actually parts made in China. I've never had any problems with my Chinese H.I.Ds that I purchased in Japan flaking off. In my experience of what I've seen is the US goes with a cheaper/lower quality Chinese products versus the products that the Japanese chooses to buy and sell from China.
3. What's legal and illegal is State by State and Country by Country and as I said my setup was legal in Japan. Big picture is understanding that not everyone on this forum lives in the United States. With CA having the strictest regulations, there's allot of things that is illegal in CA than in other states...smh
4. Wonder what VIPclk320 (Ash) has to say about the statement "you can't modify the lighting system from stock in any way" seeing that he lives in CA and has modified everything on his ride.
5. I get what you are saying technically, I already know and have read those things in the past. What I'm saying is having to strain your eyes to see on the roads that I've driven using 4100K-5000K versus seeing allot better with 6000K which maybe due to Japan using different materials and colors for their road signs i.e. Japan uses Blue & White versus Green & White. So you have to take that into consideration when you talk about frequencies. Also Dr Who, is the frequency affect the same on color blind people? What about eye sight?
6. I haven't been modifying cars for a long time. I've only been modifying my CLK for the past 7 years. My car is pretty much done. There is only 4 things left that could possibly be done to my car which would be SC, LSD, CF Driveshaft, Stereo, and/or go wide with a 9.5/11j setup.
7. Fog Lights and Driving Lights are different applications. Not talking about Headlights. My application on my projector H.I.D.s is used as Driving Lights, not Fog Lights as you will see the difference below. I wanted to make sure everyone is clear on the distinction as you correlated the rear fogs to the front fogs. As long as you get my point then I've effectively communicated be it with the use of emoticons, articulation, chat lingo, or what ever!!!


Good info though so I checked my Chinese H.I.Ds and mine meet DOT requirements. Just goes to show as I mentioned before that people have been importing cheaper Chinese Products. Believe it or not but in China they do have low quality and high quality products.
If my research is correct, your job is IT?
V C Section 26101 Modification of Vehicle Equipment
Modification of Vehicle Equipment
26101. (a) A person shall not sell or offer for sale for use upon or as part of the equipment of a vehicle any device that is intended to modify the original design or performance of any lighting equipment, safety glazing material, or other device, unless the modifying device meets the provisions of Section 26104.
(b) A person shall not use upon a vehicle, and a person shall not drive a vehicle upon a highway that has installed a device that is intended to modify the original design or performance of a lighting, safety glazing material, or other device, unless the modifying device complies with Section 26104.
(c) This section does not apply to a taillamp or stop lamp in use on or prior to December 1, 1935, or to lamps installed on authorized emergency vehicles.
Amended Sec. 45, Ch. 491, Stats. 2010. Effective January 1, 2011.
Per: http://www.dmv.ca.gov/pubs/vctop/d12/vc26101.htm I guess thier facts are Wack too, ya?
Oh, ya, here's a little something on cheap Chinese HID kits:
http://www.cbp.gov/archived/xp/cgov/...011_2.xml.html
But, US Customs must be Wack and just flexing their muscles too I guess...
Last edited by Williams707; Nov 30, 2013 at 11:22 PM.
Anyhow, Yes, I do work in IT, just bumped up actually to project management, so I may be moving to the W209 AMG, if I can ever find a one-owner with service records.
I'm going to go ahead and PM you so we can hopefully put this banter to bed, fun as a little back and forth may be.
Be well.
Good info though so I checked my Chinese H.I.Ds and mine meet DOT requirements. Just goes to show as I mentioned before that people have been importing cheaper Chinese Products. Believe it or not but in China they do have low quality and high quality products.
If my research is correct, your job is IT?







