condition mean min max 4 h after light 15.577611 14.577886 16.577336 8 h after light 14.060676 13.050705 15.070647 12 h after light 13.21999 12.888331 13.551649 4 h after dark 17.629493 13.18867 22.070316 8 h after dark 22.057551500000002 15.40494 28.710163 12 h after dark 23.278807 23.278807 23.278807