condition	mean	min	max
4 h after light	6.76379	6.58643	6.94115
8 h after light	6.053565	5.94255	6.16458
12 h after light	7.834945	7.36065	8.30924
4 h after dark	9.060115	8.52087	9.59936
8 h after dark	8.31864	8.20623	8.43105
12 h after dark	8.62585	8.61486	8.63684