condition mean min max 4 h after light 6.15465 5.29017 7.01913 8 h after light 6.679069999999999 6.50598 6.85216 12 h after light 6.829715 6.82513 6.8343 4 h after dark 9.033523333333333 8.08887 9.54564 8 h after dark 6.6469700000000005 6.39219 7.07951 12 h after dark 7.502453333333333 6.94747 8.19616