It is cool racing in the dark! And you do tend to be a little more cautious at the beginning, but since you've already done over 2 hours in the daylight, it isn't long before you're pretty near the speed you were running during the "daytime".
You may have noticed there's one car that has blue lights. This was the Team Can-Am car. Everyone else had white headlights. After speaking with Steve, I went with blue for our car. This made it easy to tell which car was ours in the dark :D
Here you can see it's just coming under the bridge..
