condition	mean	min	max
4 h after light	30.7	30.7	30.7
8 h after light	67.4	64.5	70.3
12 h after light	63.0	58.5	67.5
4 h after dark	81.2	72.0	90.4
8 h after dark	55.0	47.0	63.0
12 h after dark	18.2	10.4	26.0