condition mean min max 0 h after light 9.900495 9.81959 9.9814 4 h after light 15.13085 14.7322 15.5295 8 h after light 22.3949 22.2013 22.5885 4 h after dark 22.4043 21.8051 23.0035 8 h after dark 18.324550000000002 18.2832 18.3659 12 h after dark 11.59424 9.01298 14.1755