condition	mean	min	max
4 h after light	6.6	6.6	6.6
8 h after light	2.3	2.0	2.6
12 h after light	2.7	2.5	2.9
4 h after dark	2.65	2.4	2.9
8 h after dark	2.15	2.0	2.3
12 h after dark	3.5999999999999996	3.3	3.9