condition	mean	min	max
4 h after light	18.8	18.8	18.8
8 h after light	13.3	4.6	22.0
12 h after light	39.45	24.6	54.3
4 h after dark	16.5	5.2	27.8
8 h after dark	16.75	4.2	29.3
12 h after dark	39.95	35.9	44.0