condition	mean	min	max
4 h after light	18.6	18.6	18.6
8 h after light	64.1	42.4	85.8
12 h after light	76.9	72.5	81.3
4 h after dark	27.2	8.1	46.3
8 h after dark	80.1	77.9	82.3
12 h after dark	53.0	13.0	93.0