I have the same LED lights Mex posted. The spot light versions that have smooth reflectors. The flood light versions have stippled reflectors.
I have them wired to come on with my High beams, and Aimed for that task. And they work well for this task.
They have a very tight narrow beam, but nothing like a dedicated fog beam should have, depending on if you believe those who study automotive lighting and have actual data rather than an impression of more light make feel good warm and fuzzy..
I have to admit that my LED high beam assists were partly installed so I could return the favor when blinded by the huge amounts of nitwits who drop LED and HIDs into halogen housings and blind everybody on the other side of the road.
If your light's glare makes spots before my Eyes, I will return the favor, and we can both be blinded and dangerous.
The LEDs I have, the endcap bolts were not torqued properly and would have leaked. One of the gaskets on the endcap was folded in half too.
The clear lens is polycarbonate, not glass, they will get foggy with a lot of exposure to UV light.
Actual fog lights are supposed to have a wide flat beam with little to no upwards straying light. Yellow does not cut through fog, it is just easier on the human eyebulb.
Any film put in front of lens is going to cut light output.
The halogen bulbs advertised as white, have a blue coating on the bulb, which significantly reduces overall light output, forcing the manufacturers to overdrive the filament to meet the minimum standards of actual light output, and bulb life is decreased for it. Yet they claim brighter and whiter. Sylvania got called on their BS and had to pay 30 million dollars back to consumers for their false claims of more light of their silverstar lineup
But the light does appear whiter, which makes the human behind it think it is brighter.
With lighting, you simply cannot believe what your eyes tell you. there is feel good foreground light and actual lighting which will help one actually see road hazards better.
But screw actual data when subjective impressions can be shouted.
Then there are fashion accessories that get to eat up another 110 watts, and cause excessive glare to other drivers that yield no improvement in the ability of the human eyeball to see.
Marketing warm and fuzzies wins again.
If one wants actual fog lights, get actual fog lights designed for that purpose and Aim them properly to get the benefit of an actual fog light.