condition	mean	min	max
4 h after light	12.2	12.2	12.2
8 h after light	3.5	3.4	3.6
12 h after light	8.0	3.9	12.1
4 h after dark	31.65	26.9	36.4
8 h after dark	16.15	14.0	18.3
12 h after dark	21.35	10.7	32.0