condition	mean	min	max
4 h after light	3.3	3.3	3.3
8 h after light	2.45	2.0	2.9
12 h after light	2.0	2.0	2.0
4 h after dark	2.35	2.1	2.6
8 h after dark	2.5	1.9	3.1
12 h after dark	2.3	2.2	2.4