condition	mean	min	max
4 h after light	8.19798	8.08457	8.31139
8 h after light	6.4193	5.87484	6.96376
12 h after light	5.9643	5.74322	6.18538
4 h after dark	8.425595	7.89322	8.95797
8 h after dark	9.13431	9.03085	9.23777
12 h after dark	9.00608	8.62342	9.38874