condition	mean	min	max
4 h after light	6.0	6.0	6.0
8 h after light	6.7	3.5	9.9
12 h after light	9.6	7.0	12.2
4 h after dark	18.15	12.4	23.9
8 h after dark	12.5	7.4	17.6
12 h after dark	10.35	7.7	13.0