condition	mean	min	max
4 h after light	15.6	15.6	15.6
8 h after light	39.4	36.8	42.0
12 h after light	17.85	14.4	21.3
4 h after dark	41.25	33.2	49.3
8 h after dark	11.35	10.1	12.6
12 h after dark	51.8	33.9	69.7