condition	mean	min	max
4 h after light	7.537983333333333	7.4158100000000005	7.614789999999999
8 h after light	7.35688	7.29908	7.38708
12 h after light	7.336486666666667	7.1090800000000005	7.56308
4 h after dark	7.503793333333333	7.42678	7.6339999999999995
8 h after dark	7.557803333333333	7.37771	7.6656699999999995
12 h after dark	7.728886666666667	7.72147	7.735360000000001