condition	mean	min	max
4 h after light	6.99154	6.9577100000000005	7.030639999999999
8 h after light	6.991373333333334	6.84231	7.12033
12 h after light	7.326953333333333	7.29965	7.37793
4 h after dark	7.524693333333333	7.365589999999999	7.737439999999999
8 h after dark	7.384436666666666	7.241619999999999	7.5945
12 h after dark	7.27651	7.25904	7.29488