condition mean min max 4 h after light 10.61671 9.70192 11.5315 8 h after light 8.401769999999999 8.13568 8.66786 12 h after light 11.57406 9.43812 13.71 4 h after dark 19.4031 16.8497 21.9565 8 h after dark 22.02005 20.3807 23.6594 12 h after dark 18.055300000000003 17.5864 18.5242