I’d like to see an upgrade option for racecars without headlights to have lights added for night racing, much like the lights added to the pre-war grand prix cars in Horizon. However, unlike Horizon, I believe they should be addable/removable in the upgrade area (rather than just appearing on the car in racing).
I recognize that realistically not all types of racing are held at night, but with a good day/night and weather cycle, this would be a benefit to people like me who enjoy setting up long races. Formula One cars down the Mulsanne Straight in the dead of night sounds like a good time to me.