condition	mean	min	max
4 h after light	16.6	16.6	16.6
8 h after light	18.0	2.0	34.0
12 h after light	14.9	9.8	20.0
4 h after dark	8.65	3.8	13.5
8 h after dark	10.8	3.0	18.6
12 h after dark	16.35	6.1	26.6