condition	mean	min	max
4 h after light	8.305536666666667	8.04197	8.44288
8 h after light	8.435163333333334	8.356530000000001	8.503
12 h after light	8.21015	7.837219999999999	8.411430000000001
4 h after dark	8.445343333333334	8.271469999999999	8.60636
8 h after dark	8.491959999999999	8.301039999999999	8.60328
12 h after dark	8.540543333333334	8.390460000000001	8.630410000000001