condition	mean	min	max
4 h after light	6.88403	6.68393	7.1024899999999995
8 h after light	6.887426666666666	6.77026	7.0035
12 h after light	7.2142100000000005	6.99125	7.520060000000001
4 h after dark	7.151726666666667	7.018610000000001	7.411339999999999
8 h after dark	7.0761199999999995	6.97887	7.16942
12 h after dark	7.00034	6.8374	7.20944