condition	mean	min	max
4 h after light	6.676970000000001	6.47264	6.84761
8 h after light	6.728436666666667	6.6288100000000005	6.825880000000001
12 h after light	7.225563333333334	7.07406	7.33582
4 h after dark	7.147223333333334	7.0427100000000005	7.34323
8 h after dark	7.0337	6.88183	7.15487
12 h after dark	7.3006633333333335	7.0998	7.59357