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HID Fogs vs LED Fogs

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Old Jun 24, 2010 | 05:59 PM
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Default HID Fogs vs LED Fogs

I've received a lot of emails about us offering led fogs over the last few months. I figured they wouldn't match up to stock brightness and def. not HID brightness, but I wanted to try them out for everyone to see. I added a set to my usual LED order from my suppliers and tried them in my C5.

They are 25 SMD 880/881 fog bulbs. They look just like stock bulbs.

Excuse the comforter please. The ground is hard and hurts to lay on

HID Fog (6000k) on the left of the pic stock on the right



HID fog (6000k) on the left of the pic 25 SMD led on the right




These things provide no usable light. I could have aimed them a little higher probably, but they are still way too dim for fogs.

If someone wanted the HID look this might be for them. For functional purposes no way.
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Old Jun 24, 2010 | 06:16 PM
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Thank you for doing the research.
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Old Jun 24, 2010 | 08:02 PM
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I didn't think that LED fogs would be useful for anything but color.
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Old Jun 24, 2010 | 09:19 PM
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I'm torn - so just so I have it right!

In the picture the Stock is the Left one (Passenger Side) and the SMD LED is on the right (Drivers Side)

Is that correct?

Thanks,Matt
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Old Jun 24, 2010 | 09:20 PM
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Not trying to ruin a sale but I have had both.
The LED's look great especially in city driving but the ones I had did not give off much light to drive by but were great for driving in town with just them and your park lights on.
oncoming cars could see you easily and were not blinded at all.
I drive in the country with no streetlights and found them to not be for me so I decided to go with a yellow HID which worked great in foggy and snow conditions.
I think it really depends on where you drive asd to what you should run in them.
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Old Jun 24, 2010 | 09:35 PM
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Originally Posted by madmatt9471
I'm torn - so just so I have it right!

In the picture the Stock is the Left one (Passenger Side) and the SMD LED is on the right (Drivers Side)

Is that correct?

Thanks,Matt
The passenger side was always 6000k HID.

Originally Posted by Jeffwilson34
Not trying to ruin a sale but I have had both.
The LED's look great especially in city driving but the ones I had did not give off much light to drive by but were great for driving in town with just them and your park lights on.
oncoming cars could see you easily and were not blinded at all.
I drive in the country with no streetlights and found them to not be for me so I decided to go with a yellow HID which worked great in foggy and snow conditions.
I think it really depends on where you drive asd to what you should run in them.
No sale here just comparing the two.
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Old Jun 24, 2010 | 09:45 PM
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Wow,
Those LEDs--not so many lumens. I guess I won't buy them until they are mandatory...
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Old Jun 24, 2010 | 09:46 PM
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Originally Posted by jcgunn
Wow,
Those LEDs--not so many lumens. I guess I won't buy them until they are mandatory...
I think the pics do them a little justice. They looked worse in person
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Old Jun 24, 2010 | 10:19 PM
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Thanks for the honest opinion. I always wondered if leds were better. I bought a few leds from you and "assumed" leds were better.
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Old Jun 24, 2010 | 10:26 PM
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Thanks JW! I was confused the first time I saw the term "LED Fogs".
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Old Jun 24, 2010 | 10:46 PM
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Originally Posted by kenc5
Thanks for the honest opinion. I always wondered if leds were better. I bought a few leds from you and "assumed" leds were better.
For other areas of the car they are great. Fogs, lows, or highs not so much.
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Old Jun 24, 2010 | 10:56 PM
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Big hand for JW, Is this a great vendor or what....
Thanks for your input.
Mr.Bill
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Old Jun 25, 2010 | 12:01 AM
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A bit of clarification on WHY LED bulbs don't make good fogs.

a) Light source power: the typical 35w HID bulb produces upwards of 2000 lumens. Even the most powerful of LED tactical flashlights don't get above 300 lumens. Some automakers have managed to produce elaborate setups featuring high-powered LEDs for use in headlights, but the optics for these setups are extremely precise, expensive and large.

b) Light origin: most reflector or projector based optics, are designed to work with light from a single central source. LED bulbs have several separate light sources that are not at the central focal point of the reflector. This results in a large amount of wasted light. Those who have used LED bulbs in tail lights will relate to this.

In my research, I’ve found that LED bulbs are best suited for marker, interior, turn signal, DRL or effects lights where precision optics and high intensity are not required.
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Old Jun 25, 2010 | 12:05 AM
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Originally Posted by Mr.Bill
Big hand for JW, Is this a great vendor or what....
Thanks for your input.
Mr.Bill
Isn't he awesome.....
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Old Jun 25, 2010 | 12:34 AM
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Originally Posted by TheRadioFlyer
A bit of clarification on WHY LED bulbs don't make good fogs.

a) Light source power: the typical 35w HID bulb produces upwards of 2000 lumens. Even the most powerful of LED tactical flashlights don't get above 300 lumens. Some automakers have managed to produce elaborate setups featuring high-powered LEDs for use in headlights, but the optics for these setups are extremely precise, expensive and large.

b) Light origin: most reflector or projector based optics, are designed to work with light from a single central source. LED bulbs have several separate light sources that are not at the central focal point of the reflector. This results in a large amount of wasted light. Those who have used LED bulbs in tail lights will relate to this.

In my research, I’ve found that LED bulbs are best suited for marker, interior, turn signal, DRL or effects lights where precision optics and high intensity are not required.

I'm no expert on lighting, watts, or lumes, however one of my police tactical flashlights is the Streamlight Stinger DS LED. I can positively say it puts out more light than any single HID light on the front of my car. I can't understand why it is so diffucult to apply this to automotive headlights.
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Old Jun 25, 2010 | 12:50 AM
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Just another reason why we are fortunate to have CF (and its members....Thx JW ) as a resource.

I was wondering about the LED's...now I know.
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Old Jun 25, 2010 | 12:50 AM
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Originally Posted by Drumbum675
I'm no expert on lighting, watts, or lumes, however one of my police tactical flashlights is the Streamlight Stinger DS LED. I can positively say it puts out more light than any single HID light on the front of my car. I can't understand why it is so diffucult to apply this to automotive headlights.
Specs say your light is Up to 17,000 candela (peak beam intensity) and up to 180 lumens measured system output.

Your light appears brighter because the beam is extremely narrow compared to an automotive headlight. In addition projector optics decrease the amount of light transmitted each time it's modified (reflected, refracted)

Most projectors suffer 3 critical points of loss from the light source to the beam: The reflector Shield and lens.

The reflector: (depending on clarity and reflectivity) will slightly degrade the light output. Dirty, dull or poorly polished reflectors will yield worse output.

The cutoff Shield: this blocks roughly half the light from ever getting to the projector. Since most cutoff shields are non-reflective. Light that hits here is usally wasted.

The Lens: most projector focal lenses are a fresnel type that purposefully distorts the beam pattern slightly to prevent the sharp cutoff pattern from being a road distraction. The C5 foglights are also vulnerable to "pitting" in the glass that severely hampers output.

This is why HIDs are essential to getting the most out of a projector unit. Most commonly available LEDs are simply not powerful enough to produce the lumen muscle required to transmit enough light from the source to the road surface and back to the driver's eye.
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Old Jun 25, 2010 | 01:01 AM
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cool...thanks for the specs. The flashlight beam is much narrower than the fog pattern. I'm actually outside compairing them now lol. The flashlight is brighter to look directly at, but the fog light puts more light out front due to the much wider pattern.
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Old Jun 25, 2010 | 01:12 AM
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I have LED's in the fogs. They put out very little usable light. My lenses may be frosted. I haven't gone back to look that closely at them as I don't drive much at night. They "look" good when they are on from outside the car. But provide little useful driving light even after adjusting. Just my .02c
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Old Jun 25, 2010 | 01:30 AM
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Thanks for the heads up JW. I'm glad I went with your hids in the fogs. Why would you even want led's in the fogs, just a waste of money. It takes literally seconds to hook up the hid ballast why would you waste time and money on anything else. but hid's from JW?
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