condition	mean	min	max
4 h after light	8.319956666666666	8.15161	8.564110000000001
8 h after light	8.37929	8.25623	8.52339
12 h after light	8.58045	8.515460000000001	8.66342
4 h after dark	8.67817	8.62829	8.73277
8 h after dark	8.625436666666667	8.475019999999999	8.712760000000001
12 h after dark	8.605936666666667	8.3667	8.73965