Sup, so theres alot of visual mods you could use, like it's amazing, but one oi'd for sure recommend is Visual V and to make the lights brighter at night switch a visualsettings.dat folder you like (I'd recommend the one from Radiance V) and just drag and drop it in the following folder Mods/Update.RPF/common/data :
Or you could even try using, BEL: