condition mean min max 4 h after light 5.107113333333333 3.76666 6.12335 8 h after light 0.9466833333333333 0.40282 1.36023 12 h after light 1.5338129999999999 0.814019 2.51577 4 h after dark 6.0105699999999995 3.99246 7.79887 8 h after dark 18.588 13.1133 23.4485 12 h after dark 11.234743333333332 6.44923 13.7844