condition	mean	min	max
4 h after light	9.662700000000001	9.2558	10.0696
8 h after light	5.1521	5.10265	5.20155
12 h after light	6.533474999999999	6.10579	6.96116
4 h after dark	8.03824	7.74055	8.33593
8 h after dark	18.8431	18.4902	19.196
12 h after dark	20.88125	20.0244	21.7381