condition	mean	min	max
0 h after light	20.28555	18.6319	21.9392
4 h after light	12.20325	11.4992	12.9073
8 h after light	14.7597	14.2452	15.2742
4 h after dark	21.4996	20.9201	22.0791
8 h after dark	16.51755	16.1404	16.8947
12 h after dark	14.861	13.5827	16.1393