condition mean min max 0 h after light 13.9024 13.1216 14.6832 4 h after light 11.4632 11.2543 11.6721 8 h after light 22.572 21.7306 23.4134 4 h after dark 37.72375 30.6645 44.783 8 h after dark 21.22465 20.379 22.0703 12 h after dark 17.159950000000002 16.4405 17.8794