condition mean min max 4 h after light 18.0570915 15.620343 20.49384 8 h after light 17.861383500000002 17.610091 18.112676 12 h after light 15.914852 15.057592 16.772112 4 h after dark 23.015102499999998 19.502847 26.527358 8 h after dark 19.212971 16.542571 21.883371 12 h after dark 15.664337 15.664337 15.664337