condition	mean	min	max
4 h after light	7.455613333333334	7.3220600000000005	7.706110000000001
8 h after light	7.396546666666667	7.27822	7.536239999999999
12 h after light	7.49965	7.45137	7.53603
4 h after dark	7.589756666666666	7.54352	7.65222
8 h after dark	7.58056	7.33443	7.94115
12 h after dark	7.496553333333333	7.17507	7.740539999999999