condition mean min max 0 h after light 5.08098 4.97901 5.18295 4 h after light 7.677524999999999 7.539 7.81605 8 h after light 7.09052 7.01743 7.16361 4 h after dark 8.62034 7.62456 9.61612 8 h after dark 7.510115 7.48661 7.53362 12 h after dark 6.549495 6.30568 6.79331