condition	mean	min	max
4 h after light	7.806813333333333	7.734319999999999	7.8743300000000005
8 h after light	7.8105	7.74255	7.87967
12 h after light	7.846473333333334	7.5984300000000005	8.01573
4 h after dark	7.881083333333333	7.67678	8.08152
8 h after dark	7.9077633333333335	7.80577	8.1015
12 h after dark	8.10083	7.9304	8.19073