condition	mean	min	max
4 h after light	16.9	16.9	16.9
8 h after light	9.1	2.8	15.4
12 h after light	18.6	6.1	31.1
4 h after dark	16.2	5.0	27.4
8 h after dark	10.5	10.3	10.7
12 h after dark	4.6	3.9	5.3