condition	mean	min	max
4 h after light	16.8	16.8	16.8
8 h after light	12.6	9.2	16.0
12 h after light	18.45	15.6	21.3
4 h after dark	21.8	21.1	22.5
8 h after dark	15.25	12.4	18.1
12 h after dark	12.1	9.5	14.7