condition	mean	min	max
4 h after light	16.2	16.2	16.2
8 h after light	9.15	2.1	16.2
12 h after light	19.15	12.5	25.8
4 h after dark	10.0	3.8	16.2
8 h after dark	19.25	16.1	22.4
12 h after dark	9.15	1.7	16.6