condition	mean	min	max
4 h after light	8.27425	8.03152	8.4386
8 h after light	8.14274	7.759119999999999	8.350810000000001
12 h after light	8.312196666666667	8.14419	8.52392
4 h after dark	8.15842	8.02192	8.30804
8 h after dark	8.22073	7.876930000000001	8.505339999999999
12 h after dark	8.476286666666667	8.31223	8.56183