LED fog light question

I would like to install LED fog light and it is original type and 100W. As far as I know, the OEM is 55W halogen. Does anyone know the 100W H3 LED has no issue? Thanks in advance.

On my 99, the High Beam, Low Beam and Fog Lights are all H7 55W. I recommend sticking to that wattage otherwise you may ruin/burn the inside of your headlights. The fog light bulbs are probably the closest to the headlight lens. Last I saw a pair of new headlights were around $3,000. Really want to run a $3K experiment?

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Heat is one thing and as Joe noted, that could damage the headlight enclosure. The other issue is current. If the fuse is rated to support two 55W bulb, regardless if they're halogen or LED, installing a bulb at twice the current requirement will more than likely blow the fuse. Question - Why? The bluish color? Trying to match the Xenon main lights? You think it will increase clarity or something? My best advice is to purchase HID-like (i.e. blue tinted) 55W halogen bulbs. Problem solved.

I'm pretty sure the LEDs draw less current than the halogen for a given brightness, but I don't know much about electromagic. I saw several 996 at my last PCA event with LED bulb replacements. I've done it to my Land Crusier fogs and high beams, and have considered the same for my 996. There are some good quality LEDs out there now with proper diode placement so they avoid the old problem with scatter when placed in halogen projectors.

Heat is not a problem with LED but current draw always is when straying from stock. I bought these when replacing ALL bulbs inside and out last year and have been very pleased with how well they match the headlights: Cougar Motor H3 CREE LED Fog Light/DRL Bulbs - 30W 5000K Bright White (Pack of 2 bulbs) Amazon Amazon

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Those have some VERY bad reviews on Amazon saying they are dim. Were these really brighter than stock H3 55w bulbs?

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I seriously doubt it, but with the litronics I never rawked the fogs w/o the headlights so I�m not a source for data points on that one. I was far more concerned with them being pink or blue compared to the headlights and in that regard they work for me. They�ve been in for over a year w/o issue, which also works for me. But reviews do slant my decisions on purchases, so do (or don�t do) whatever makes you feel groovy baby.

Originally Posted by jllphan Heat is not a problem with LED but current draw always is when straying from stock. I bought these when replacing ALL bulbs inside and out last year and have been very pleased with how well they match the headlights: Cougar Motor H3 CREE LED Fog Light/DRL Bulbs - 30W 5000K Bright White (Pack of 2 bulbs) https://www.amazon.com/dp/B06XK9THPF..._LAgmDbY48M6KP https://www.amazon.com/dp/B06XK9THPF..._LAgmDbY48M6KP ------------ Thanks, I gonna buy it.

The stock H3 bulb would be much brighter than the LED. But I'm going to buy the LED since I used the fog light as DRL.

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No warning light with it?

Nope. I installed LED�s everywhere inside and out (save the headlights) and the only thing extra I needed was an LED flasher relay for the turn signals. Have had zero issues with any light installed and can post links to all used if desired. IIRC, I think I spent about $175 to replace them all.

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I think LED can create the surface heat just like that of tungsten filaments. Why? While LED produces a visibly brighter looking light at the source, the individual lumen measurements are not that great and require a cluster along with microlens technology to amplify the light. You add a high lumen LED fixture to the larger projector instrument inside the light enclosure, and you produce a very nice light with little light diffraction. But IMHO, heat is still a problem and probably why you see a lot of heat sinks mounted on the rear of the higher lumen LED bulbs.

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My understanding is that you need a specially designed fixture to get the full benefits of the LED bulb, yes?

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Are you talking about the front turn signal PY 21W?

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Some of the newer bulbs mimic the placement of the lit part of the original bulb and can be used in cars originally designed for halogens. The older ones and less expensive/generic ones often don't so you get a lot of scatter. Oh, and this is not a 996 comment, but they work better than the incandescents on my Land Cruiser (200 series). I'll eventually get around to putting them at least into the low beams on my 996. It just isn't high on my to-do list.

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Not to sound combative, but this isn't really a matter of opinion, it's science. LEDs don't product Infrared Radiation (heat) at anywhere near the rate of a traditional halogen. That's why you can touch an LED after it's been lit for a few min and can't with a halogen bulb. That's not to say they don't generate heat, the circuitboards certainly do. As a matter of fact, the heat sinks you see on higher lumen LEDs are to cool the circuit board the LEDs are affixed to, not the bulb. Regardless, the lights i linked are not those, don't need huge heat sinks and don't generate heat inside the headlight enclosure at anywhere near the rate of the halogen bulb it replaced. Just trying to clear the air for those who may find this thread down the road. Given this community, I'm sure an engineer will come along and drop knowledge on all of us, but in my experience, LEDs don't "project" light as well as incandescents. They are just as bright to look at, but pointing that bulb away from you to use as a headlight or flashlight, they don't illuminate as far. I would not replace a headlight with an LED, but as mentioned above, I never solely rely on my fogs for lighting my surroundings, so i look at it as more of an accessory bulb and was primarily focused with functionality (from a longevity standpoint coupled with no flicker, CELs, etc.) and aesthetics (how well it matched the rest of the bulbs in the headlight enclosure). The lights i linked above were for replacing the foglight bulb (H3). When asked if I encountered a warning light from installing these, I mentioned that I had not -- and when replacing all bulbs (fogs, drls, front and rear turn signals, brake lights, tail lights, inside door lights, vanity lights, etc. etc. etc.), the only thing i needed to add was a flasher relay for the turn signals. If you are just replacing the fog lights, the bulbs I linked above need nothing additional to function the same way the incandescents they replaced. Sorry if i confused ya.

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I don't think you're being combative. I like a good debate. Light emitting diodes are virtually absent of IR and more of a matter of thermodynamics in relation to heat. You say, "heat at the circuit board?" I don't follow you there. What are you talking about? Most of the wasted energy can be measured at the base which explains the location of heat sinks on LED auto bulbs. For the record, I never said they create the same amount of heat in comparison to halogen watt for watt. LED are definitely cooler and more efficient. Halogen bulbs are well known for generating lots of heat especially if you get up above 100W level. Again, high output LED auto bulbs can produce as much heat as halogen. Here's a good resource... https://betterautomotivelighting.com...ght-bulbs-get/

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Good deal, I�ve been a part of many a online forum over the years and always wish to honor the sense of community and respect for others. Yes, most LED fixtures that have multiple diodes are all wired together to a small circuit board, sometimes called a junction. I�m not sure what the proper technical term is, but it looks like a small circuit board to me. That�s the part that generates heat on LED bulbs as identified in that article you linked above when they mention the heat output of the front vs back of the led lights. Notice how the back of those tested is significantly hotter than the front? That�s why those equipped with heat sinks are placed at the base of the fixture (where the �circuit board is located) and not the top where the diodes are. Regardless, that article is comparing high lumen output headlight bulbs. As stated above, I�m not a fan of those and would not use them based on the fact that led technology has yet to reach a point where they surpass incandescent bulbs with regards to light dispersion. Additionally, I�m aware of how much heat the base (where the �circuit board� is) generates, and even though high lumen leds have functional heat sinks (heck some have fans); I still question if they work well enough to prevent damaging the the oem socket/wire. The bulbs I linked above have less than 1/3 of the lumen output of those in the link you posted and don�t generate nearly that much heat. Based on my experience with this vehicle and the half dozen others I�ve installed medium-to-low lumen leds, I do not fear damaging any part of the oem fixture, socket or wiring.