Why do Toyotas have yellow fog lights?

Yellow Fog lights vs LED Bright White

Tundra Limited - Foglights ~ yellow or OEM

I understand that they are serving the purpose that you have requested of them, and I tend to shy away from blasting other products as it's not really my M-O, but I also have to point some things out because folks will trickle into this thread and others for years to come I imagine. In order for a bulb of any kind to operate properly in a housing designed around a halogen bulb it would have to emit light uniformly from a precisely centered point inside of the housing. An LED bulb can't truly achieve this for multiple reasons. 1) It can't be located in the center of the housing as the LED chips need a surface on which to mount pushing it away from center, and 2) an LED chip can only produce light in a single direction. Having these elements out of place leads to increased glare/uplight and decreased performance where it's needed most. Whether the owner of these types of bulbs knows that they are causing more glare to oncoming traffic is up for debate, but in reality they are. Please (if you're able/willing) post pictures of just the fog lights on with the truck about 10ft away from a garage door and I can explain what I mean.

The concept of a plug-and-play switchback bulb further compounds these issues. In order to produce dual-color output a switchback bulb must contain 2 separate pairs of LED emitters. Neither of which are in the same place, and neither of which are occupying the true centerpoint of the housing.

TL;DR -
I can't stop anyone from buying products that have a bevy of gimmicks from switchback functionality to promising 4 BILLION lumens of output, but I can at least educate those who are cruising around looking for information. The LED manufacturers will continue to produce and sell millions of these products to people who don't want to spend a lot of money or to people who simply want the different look when on. If the change in look is all that you're going for, know that you most likely are blinding your fellow motorist, but party on. I can't stop you.

If you want to upgrade your housings and get peak fog performance there's options like full replacements such as the Diode Dynamics SS3/Elite, Morimoto 4Banger, Rigid SAE.
If you want to keep the OEM look then upgrading the bulb to a higher wattage bulb like a Philips HIR bulb.
If you're dead set on a drop-in LED, want yellow, and actually want a performance improvement the closest bulb I have seen to actually representing the central emitter point is the Morimoto 2Stroke 3.0. It won't match a standalone housing's performance, but it'll definitely be a jump from OEM.

If you want to learn more, please visit our website Carri.

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