Let me tell you something, GTP. I'm not as critical about headlights as I am about damage. Headlight usage can really be seen in stuff like sportscar racing and rally racing. In terms of sportscar racing rules, amber lights are used by GT race cars, while the prototypes have the bright lights. The only other game I know where you can change light colors is "Tokyo Xtreme Racer 3." And I'm going on games I've previously played. In addition to light colors, if you get a fog light kit, you get extra lights to work with.
The best useage of headlights in a racing game that I know of is "Le Mans 24 Hours." Those things are BRIGHT! When you see a sportscar race on television, lights are usually pretty bright, so the lights are bright when darkness ensues the whole race track. I've been using "Le Mans 24 Hours" in a lot of my Gran Turismo discussions... all I can say is, if you don't have the game and you like Gran Turismo, get Le Mans 24 Hours. It may be an older game, but still a good one. But back on topic, I think Le Mans 24 Hours has some of the brighest light displays. Race an event in the rain or one of the two endurances in the game, and just look behind you to see those lights really shine at night. I think if PD can make something this bright, but functional, the gaming action would be great at night.
I would surely like to race Grand Valley, Deep Forest, Tokyo R246, and Le Mans at night. Autumn Ring Mini would be a nice sunset deal, as would El Capitan and Suzuka. For a weird twist, maybe Seattle should be raced in not rain- but snow! The track is technical with elevation changes, so a rally challenge would be nice on an existing course with snow or ice. And I agree. I think PD should try to come up with a time engine for all or most tracks. In addition to time, perhaps add some weather effects. Like in an Endurance Race, it's partly cloudy, then it rains, and EVERYONE dashes to the pits to change to Rain Tires. You dig my vibe, man?