condition	mean	min	max
4 h after light	18.4	18.4	18.4
8 h after light	21.5	20.8	22.2
12 h after light	12.7	4.0	21.4
4 h after dark	5.55	5.0	6.1
8 h after dark	15.85	4.5	27.2
12 h after dark	5.35	3.0	7.7