condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	12.55	5.5	19.6
12 h after light	13.0	3.6	22.4
4 h after dark	5.0	3.5	6.5
8 h after dark	14.35	1.7	27.0
12 h after dark	22.8	20.8	24.8