condition	mean	min	max
4 h after light	2.4	2.4	2.4
8 h after light	2.35	2.0	2.7
12 h after light	2.25	1.9	2.6
4 h after dark	4.0	2.9	5.1
8 h after dark	6.15	6.0	6.3
12 h after dark	4.85	2.4	7.3