condition	mean	min	max
4 h after light	17.1	17.1	17.1
8 h after light	16.35	0.5	32.2
12 h after light	1.75	1.0	2.5
4 h after dark	25.25	16.8	33.7
8 h after dark	17.7	14.6	20.8
12 h after dark	21.55	19.0	24.1