Hey mate. Many of my JNS oval tracks have lights. They aren't the most glamorous looking AMS tracks but they do offer the day to night transition option. They work best with the CART Extreme mod.
Tracks with working lights for night races:
Atlanta
Bristol
California
Charlotte
Chicago
Darlington
Daytona
Gateway
Homestead
I70
Iowa
Kentucky
Las Vegas
Mansfield
Memphis
Milwaukee
Myrtle Beach
Nashville
Nazareth
ORP
Phoenix
Richmond
Texas