condition	mean	min	max
4 h after light	17.7	17.7	17.7
8 h after light	28.6	19.2	38.0
12 h after light	10.15	1.1	19.2
4 h after dark	10.5	6.3	14.7
8 h after dark	12.95	9.0	16.9
12 h after dark	18.45	10.4	26.5