RL1990

Fog lights put out a wide beam of light just in front and to the sides of the truck. They are designed for and intended to be used in inclement weather and poor visibility. That means you are going very slowly and looking directly in front and to the sides of the truck to stay in your lane. In this situation they work very well. In normal conditions you won't notice them because at high speeds you're not looking directly in front of the truck.

acdii

They do light up the sides though far enough to see if there may be Deer or other varmints. I can tell when they are off with the LED. With the original halogens though, not so much. My DD is mainly on unlit rural highways, where they are greatly appreciated.

sbronemann

Has anybody used the Sylvania Zevo LED 9145 lights in your fog lights? I see they are a bit pricey....but Sylvania has been known for quality products. Any insight would be great...

mikemtn

https://www.cartalk.com/content/do-f...ou-see-through

dodgeman1

Do fog lights help? My opinion is not really. First off, I only turn them on if the weather is bad, heavy rain, snow or fog. Most factory fogs don’t do a thing in clear weather but most don’t blind other people either but I’m sure we all have seen some that do blind other people.

I once tried driving in heavy fog with just the fogs. Worked great but stuff up high you can’t see. In my case I came up on a stop sign and you just couldn’t see it until the last second, so I turned the low beams back on.

jp2012

Unfortunately, about all this will tell you is that there may be a deer about to hit you or be hit by you. The light provided by the fogs (especially the OEM's) almost surely won't give you enough advance warning to actually avoid anything. At least you won't have to wonder what that "Thump" was.

iknfixit

Just for thought, years ago fog lights were low mounted and yellow lens. We don’t see those too much anymore. Low mounted to shine under fog, and yellow to cast less reflection on the fog itself, but light up the road. Makes me think of the blue blocker sunglasses... intent was to block the blue lighting and intensify colors we see. Grass was really green thru them!
Today... no yellow lenses anymore.... bluer brighter lights.. so I guess they aren’t fog lights anymore. Just driving lights to light up the road below fog...or just in front of the vehicle. And bluer whiter light doesn’t enhance color in the dark...everything looks gray or black?
Hmmm. Other opinions?

Honu

I agree. Fog lights are designed for moisture in the air, which includes fog, rain, snow, 'wintery mix', etc. Bright white fogs are not as effective as something that leans more towards the amber color of the spectrum. When you make your fogs brighter and whiter you are getting away from the point of what they are supposed to do -- minimize reflection off of the fog or precipitation and provide better visibility of the sides and lines of the road. They are made for slower speeds (you're expected to slow down during inclement weather with poor visibility).

One item of note that some people don't consider is the fact that the driver will tend to look towards the brightest area of light. It makes sense since in the dark you're generally going to want the best lighting your eyes can get. By turning on your fogs you are bringing your eyes closer to the vehicle. By the time you see Bambi it's too late, whereas if you were looking further ahead (fogs off) you'd have more reaction time.

I agree that the XLT halogen lights leave something to be desired, so if you must upgrade any lights -- upgrade the headlights and not the fogs. The fogs are not bright white for a reason.

SHO4CY

Tom, what did you think of the Supernova V3's?

acdii

FWIW here is what with and without looks like with the LED bulbs in stock "fog" housings on a very dark country road. One is low, one is high, one is low without fog.

I tend to agree these are not fog lights, but driving lights.