I'm sure someone on here knows the actual answer, but the way the lens is diffused on mine casts a wide narrow light all the way across my lane. I have it aimed slightly to the right. This lights up from the center line in the road all the way to the ditch. I was suprised how bright it is without the headlights on. I'm still curious how it does in the fog. As was said earlier in the thread that one is utilitarian. I feel it fits my truck.
i like it but iam a little biased. had a set wired into the low beams on a ot like u mention , got a call on the cb from a truck driver he was not happy.
Scoured the Iola car show for a pair for my coupe. Finally found a pair of ambers and surprise to me, they were 12 volt. Would never run a light like this without relays.
I've had just one fog lamp for years, just something to set off the front end. Nice when your bringing up the tail on a cruise, they can see you a long ways back and know where you are--