condition mean min max 0 h after light 6.95214 6.6782 7.22608 4 h after light 7.2578499999999995 6.68877 7.82693 8 h after light 8.172445 8.00497 8.33992 4 h after dark 8.588470000000001 8.44634 8.7306 8 h after dark 8.936105000000001 8.2695 9.60271 12 h after dark 7.1162399999999995 6.71119 7.52129