condition mean min max 0 h after light 32.99695 32.9503 33.0436 4 h after light 16.43005 15.9722 16.8879 8 h after light 13.84165 13.0397 14.6436 4 h after dark 19.8234 17.445 22.2018 8 h after dark 22.1445 21.6763 22.6127 12 h after dark 25.0351 20.2915 29.7787