Fights seldom last more than 1-2 mins

Randel laughed, but the sneering tone was gone from his voice when he
said, “I accept your challenge. But I’ll not ask for your name or make pleas
on your behalf to the gods when this is over. That’s not our way. We simply
kill or die. The glory lies in the battle, not what is said or done afterwards.”
Randel edged away from the shelter of the tree, into the deadly sunlight.

Like vampires, he couldn’t comfortably stand exposure to the sun. But
fights between children of the night seldom lasted more than a minute or
two. One way or the other, he wouldn’t have to tolerate the irritation for
long.

***

The Saga of Larten Crepsley: Ocean of Blood, Chapter 5