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post #11 of 23 (permalink) Old 04-19-2017, 08:21 AM Thread Starter
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Originally Posted by Mark_ View Post
When used in actual fog or even heavy rain, nothing beats a yellow bulb.


I've heard this before. But during fog I've tested using headlamps, headlamps + fog, and fog only and (maybe it's just me) I couldn't tell the difference. I actually thought I could see better with the lamps over the fog lights.

The headlamp + fog added some light, but I wouldn't say that I could see farther or clearer.

What do you think? Or am I thinking about the context of how to use fog lights wrong?
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post #12 of 23 (permalink) Old 04-19-2017, 09:21 AM
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I've heard this before. But during fog I've tested using headlamps, headlamps + fog, and fog only and (maybe it's just me) I couldn't tell the difference. I actually thought I could see better with the lamps over the fog lights.

The headlamp + fog added some light, but I wouldn't say that I could see farther or clearer.

What do you think? Or am I thinking about the context of how to use fog lights wrong?
You make valid points there, and let me shed a little light (haha) :
The Cherokee fog lamps have terrible optics. The bulbs in them are just typical halogen fog light bulbs, but the optics being so bad, the beam pattern is not what a fog light pattern should be : low and wide. These lamps throw too much light up and not enough wide. In fog, you need all the light to be low and wide, and any bleeding up causes discomfort for your eyes as light going up hits water dropplets and makes it very difficult for us to see anything ahead.

The stock halogen headlights are also pretty terrible on the Cherokee in terms of beam pattern and usable output, but the cutoff is very sharp so there is very little bleeding up ; this means that in fog, the headlights would actually do better than the stock fog lights for foreword vision. But the headlight beam is also very narrow, so not so great in fog in that sense.

In an ideal world with great lamps, yellow works best in fog, heavy rain and snow because no matter how low and wide your beam is, you will have light hitting a lot of little water particles, which causes eye discomfort, and yellow light is the least offending to the human eye, Yelllow light allows our eyes to see better in such conditions, if you will.

With that all said, if you want useful fog lights on the Cherokee, you have to replace the lamps, as stated above by another member. There are some good ones out there, though not cheap : Rigid, JW Speaker, KC Hilites Gravity, and there could be more quality ones (edit to add : yes, Morimoto makes some good ones as well)... And if you want true fog light capability, get a model with amber lenses.

Replacing the bulb in the existing factory fog lamp wouldn't do much good...
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Last edited by Mark_; 04-19-2017 at 12:19 PM.
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post #13 of 23 (permalink) Old 04-19-2017, 11:57 AM
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post #14 of 23 (permalink) Old 04-19-2017, 12:01 PM
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post #15 of 23 (permalink) Old 04-19-2017, 12:18 PM
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I knew I was forgetting one good fog light brand. Thanks for the reminder.

Would you happen to have forwards shots of your fog lights against a wall, or onroad ?

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post #16 of 23 (permalink) Old 04-19-2017, 12:30 PM
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No but I'll try to remember to take some maybe tonight and post...


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post #17 of 23 (permalink) Old 04-19-2017, 01:11 PM
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Originally Posted by Mark_ View Post
You make valid points there, and let me shed a little light (haha) :
The Cherokee fog lamps have terrible optics. The bulbs in them are just typical halogen fog light bulbs, but the optics being so bad, the beam pattern is not what a fog light pattern should be : low and wide. These lamps throw too much light up and not enough wide. In fog, you need all the light to be low and wide, and any bleeding up causes discomfort for your eyes as light going up hits water dropplets and makes it very difficult for us to see anything ahead.

The stock halogen headlights are also pretty terrible on the Cherokee in terms of beam pattern and usable output, but the cutoff is very sharp so there is very little bleeding up ; this means that in fog, the headlights would actually do better than the stock fog lights for foreword vision. But the headlight beam is also very narrow, so not so great in fog in that sense.

In an ideal world with great lamps, yellow works best in fog, heavy rain and snow because no matter how low and wide your beam is, you will have light hitting a lot of little water particles, which causes eye discomfort, and yellow light is the least offending to the human eye, Yelllow light allows our eyes to see better in such conditions, if you will.

With that all said, if you want useful fog lights on the Cherokee, you have to replace the lamps, as stated above by another member. There are some good ones out there, though not cheap : Rigid, JW Speaker, KC Hilites Gravity, and there could be more quality ones (edit to add : yes, Morimoto makes some good ones as well)... And if you want true fog light capability, get a model with amber lenses.

Replacing the bulb in the existing factory fog lamp wouldn't do much good...
I just picked up my Granite '17 High Altitude Monday. The fogs are hideous along side the LED DRL's and HID headlights. You mentioned the JW Speaker, Rigid, Morimoto, etc. as replacements. Is there a thread with specific models and parts lists, and or tutorials?

Nevermind! I found it in the how to section...
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Last edited by freejersey; 04-19-2017 at 01:46 PM.
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post #18 of 23 (permalink) Old 04-23-2017, 10:59 PM
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Originally Posted by Mark_ View Post
I knew I was forgetting one good fog light brand. Thanks for the reminder.

Would you happen to have forwards shots of your fog lights against a wall, or onroad ?


Here's a shot of the Morimoto fogs only...


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post #19 of 23 (permalink) Old Yesterday, 12:38 AM
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Originally Posted by TopGunKovac View Post
Here's a shot of the Morimoto fogs only...
That looks like a very decent cutoff... Difficult to tell there, but do you notice if the beam is wider than with the stock fog lamps ? I'm asking because the stock ones have a beam pattern that is much too narrow to be of any use as fog lights, or even turning lights on tight turns when it's really dark. I also think there could be a problem with not only the OEM lamps' optics being bad, but also the fact that (I think) the lamps sit too far back (recessed) in the bumper to be able to throw wide.

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post #20 of 23 (permalink) Old Yesterday, 08:23 AM
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Here's a shot of the Morimoto fogs only...


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Holy Cow!!

Those look REALY nice...the custom brackets for my HID drivers are fading away fast.....
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