condition	mean	min	max
4 h after light	1.1	1.1	1.1
8 h after light	20.35	8.5	32.2
12 h after light	20.85	14.2	27.5
4 h after dark	26.15	16.3	36.0
8 h after dark	25.65	20.2	31.1
12 h after dark	12.6	7.0	18.2