condition	mean	min	max
4 h after light	6.6	6.6	6.6
8 h after light	2.45	2.3	2.6
12 h after light	4.8	3.8	5.8
4 h after dark	6.15	3.9	8.4
8 h after dark	3.0	2.4	3.6
12 h after dark	6.4	5.3	7.5