condition	mean	min	max
4 h after light	6.90786	6.683260000000001	7.0739600000000005
8 h after light	7.461313333333334	7.04865	7.694660000000001
12 h after light	7.22384	6.78883	7.46968
4 h after dark	7.013683333333334	6.60561	7.5216899999999995
8 h after dark	6.76799	6.597860000000001	6.93447
12 h after dark	6.790103333333334	6.592969999999999	6.976710000000001