condition	mean	min	max
4 h after light	20.6	20.6	20.6
8 h after light	19.85	17.7	22.0
12 h after light	8.3	7.4	9.2
4 h after dark	21.3	6.4	36.2
8 h after dark	19.45	5.9	33.0
12 h after dark	44.65	34.9	54.4