condition	mean	min	max
4 h after light	13.9	13.9	13.9
8 h after light	3.7	3.2	4.2
12 h after light	2.45	2.3	2.6
4 h after dark	14.6	4.7	24.5
8 h after dark	19.5	2.0	37.0
12 h after dark	21.6	18.5	24.7