This only happens during the day in game (and around when the auto headlights come on) they're basically so dim you couldn't even tell they were on. Same goes for the spotlight. At a certain point at night when it gets completely dark the headlights go back to being bright again and the els lights go back to red from an amber/yellow color forcing me to only do night patrols. I have natural vision remastered downloaded along with its brighter emergency lights option. Have mostly every graphic setting set to very high or above, however post fx makes my performance a lot worse so I keep it on high along with grass and water textures at normal. Should I get rid of natural vision and try something else? I used to use Radiance V along with some other visual mod, which I can't remember, with 0.3 which worked fantastic but I wasn't sure if that was all compatible with 0.4.

Radiance V is supposed to make the emergency lights brighter but it is so outdated I would hope it would work on 0.4.  I haven't installed it yet on 4.  I guess make a back up of visualsettings, I think it replaces, and install it.  I'm not sure of any other mods that make the emergency lights brighter.  Rad V is the most well known to fix that problem.