condition	mean	min	max
4 h after light	15.7708	12.5028	18.4365
8 h after light	12.87212	3.86356	19.5467
12 h after light	13.232513333333333	8.31444	19.0625
4 h after dark	18.9151	14.3189	23.4039
8 h after dark	19.6675	15.5118	21.9834
12 h after dark	14.1145	11.9516	15.24