condition mean min max 0 h after light 11.21305 11.178 11.2481 4 h after light 8.17457 7.36375 8.98539 8 h after light 3.606065 3.20596 4.00617 4 h after dark 5.75721 5.03745 6.47697 8 h after dark 9.036380000000001 8.242 9.83076 12 h after dark 8.232145 7.20832 9.25597