condition	mean	min	max
4 h after light	69267.5	68173.5	70361.5
8 h after light	62877.35	62799.5	62955.2
12 h after light	56601.45	55418.8	57784.1
4 h after dark	40295.75	35619.0	44972.5
8 h after dark	64277.1	63983.0	64571.2
12 h after dark	63747.15	63651.3	63843.0