condition	mean	min	max
4 h after light	3.9	3.9	3.9
8 h after light	18.9	4.3	33.5
12 h after light	4.1	3.3	4.9
4 h after dark	19.4	12.1	26.7
8 h after dark	14.1	7.0	21.2
12 h after dark	29.85	20.7	39.0