condition mean min max 0 h after light 2.21787 1.94258 2.49316 4 h after light 3.332305 3.27749 3.38712 8 h after light 3.058295 3.01473 3.10186 4 h after dark 5.99944 4.8972 7.10168 8 h after dark 6.022905 4.95229 7.09352 12 h after dark 3.563245 2.97681 4.14968