condition	mean	min	max
4 h after light	2.0	2.0	2.0
8 h after light	3.1	2.6	3.6
12 h after light	19.5	14.9	24.1
4 h after dark	24.15	19.7	28.6
8 h after dark	13.35	6.8	19.9
12 h after dark	12.15	10.3	14.0