condition	mean	min	max
4 h after light	4.0	4.0	4.0
8 h after light	9.6	2.5	16.7
12 h after light	6.65	3.8	9.5
4 h after dark	11.55	1.6	21.5
8 h after dark	2.8	0.8	4.8
12 h after dark	20.9	19.7	22.1