In the fogs, they are outstanding. I do a lot stargazing with the local astronomy club and with my son. Just the fogs alone I can light up the road directly in front of me damn well. The headlights just aren't that great, even in high beam mode, when I'm traversing these extremely dark roads. I almost feel like I'm outrunning my headlights, and this is doing 35-45mph. With father's day coming around, the wife usually lets me pick something to do with my vehicles ( I also have a 1968 Mustang that has been "resto-modded") I'll let you know if I get the bulbs, and how they perform!