condition	mean	min	max
4 h after light	17.6	17.6	17.6
8 h after light	15.95	15.5	16.4
12 h after light	22.2	18.0	26.4
4 h after dark	19.25	2.5	36.0
8 h after dark	22.0	19.0	25.0
12 h after dark	22.15	20.1	24.2