condition	mean	min	max
4 h after light	2.0	2.0	2.0
8 h after light	14.75	5.2	24.3
12 h after light	15.8	15.3	16.3
4 h after dark	6.45	5.2	7.7
8 h after dark	20.55	16.3	24.8
12 h after dark	2.3	1.3	3.3