condition	mean	min	max
4 h after light	13.6	13.6	13.6
8 h after light	5.25	5.2	5.3
12 h after light	18.45	7.6	29.3
4 h after dark	5.0	4.4	5.6
8 h after dark	7.9	2.0	13.8
12 h after dark	3.4	3.4	3.4