That's why very few foglights are more than cosmetic. Hella's a notable exception, although if you want yellow, Cibie probably lead the field (with 100 years experience of that niche market, they ought to) although have reservations about the Valeo "let's beat the replica makers at their own game" versions.
Blinglights sound quite promising - but the name's so off-putting.
" . . . every single aftermarket LED fog I have tried out over the last few months. . . " You must have quite a collection! Don't tell me, all in the name of - research.
Aye, research! I spend enough time at higher altitudes that those nasty little rolling fog banks and low clouds are a real issue, and yellow fogs are handy in dust storms too, something I seem to deal with frequently. Around home, we get whiteout conditions with just a few centimeters of snow.
Outfitting Khan has been difficult due to the obscene volume of just plain wrong information about JL stuff.
I have zero qualms about returning/exchanging/raising holy hell where my money is involved. Outfitting Bert was cheap and easy as everyone here did all the hard work for me ahead of time. Khan, not so much due to what I have been referring to as JLulls*t
I tried a few cheap mods and sources, all proved to be worthless.
Kapton tape comes in the right color but lacks the durability and doesn’t handle curved factory LED fogs well at all.
I ended up ordering true amber 8mm lexan from an industrial supply house which I’ll thermoform at the maker space on campus. My twidget counterpart there is helping me to 3D print clips and a retaining ring for the Bondi bumper fog holes.