Congrats on taking the Checkered! Sounds like you had a great time.
Racing at nite is certainly different. Can't have too many lights. When I ran a 4-hour nitetime EMRA enduro, we had fitted a lightbar that bolted to the front bumper of our Fiat 124 Coupe. We had 4 lamps on it; 2 pointed downstream, and 2 fog lamps angled to the sides. Gave us a nice broad stream of light. Being able to see apexes was very helpful.
Another trick we used was to put strips of tape across the rear window to help cut the glare of headlights in the mirror.