condition	mean	min	max
4 h after light	4.1	4.1	4.1
8 h after light	3.4	2.2	4.6
12 h after light	2.15	1.0	3.3
4 h after dark	16.2	5.6	26.8
8 h after dark	15.55	7.4	23.7
12 h after dark	12.35	6.7	18.0