condition	mean	min	max
4 h after light	4.0	4.0	4.0
8 h after light	5.9	5.0	6.8
12 h after light	39.55	35.8	43.3
4 h after dark	20.35	19.9	20.8
8 h after dark	26.55	8.0	45.1
12 h after dark	19.65	11.4	27.9