condition	mean	min	max
4 h after light	8.27669	8.14777	8.3433
8 h after light	8.414890000000002	8.31925	8.518360000000001
12 h after light	8.30301	8.06736	8.47845
4 h after dark	8.202223333333333	8.0435	8.31005
8 h after dark	8.06117	7.82925	8.27637
12 h after dark	7.9837299999999995	7.892189999999999	8.115039999999999