condition	mean	min	max
4 h after light	2.1	2.1	2.1
8 h after light	18.8	7.2	30.4
12 h after light	2.15	2.0	2.3
4 h after dark	4.6	3.5	5.7
8 h after dark	12.1	3.7	20.5
12 h after dark	16.0	4.0	28.0