condition mean min max 4 h after light 9.3114215 8.6571 9.965743 8 h after light 7.597885 6.743153 8.452617 12 h after light 8.9704485 8.322675 9.618222 4 h after dark 8.942654000000001 8.397456 9.487852 8 h after dark 9.602933 8.6571 10.548766 12 h after dark 8.66199 8.66199 8.66199