condition mean min max 4 h after light 5.769415 5.44863 6.0902 8 h after light 4.89132 4.85339 4.92925 12 h after light 5.436935 5.04515 5.82872 4 h after dark 6.32838 6.13077 6.52599 8 h after dark 5.06253 4.93244 5.19262 12 h after dark 5.7382550000000005 5.66594 5.81057