condition	mean	min	max
4 h after light	6.9127600000000005	6.407780000000001	7.18584
8 h after light	6.55655	6.17401	6.9095699999999995
12 h after light	6.813026666666667	6.29943	7.2359800000000005
4 h after dark	6.7348333333333334	6.51154	7.050680000000001
8 h after dark	6.5120499999999995	5.9236699999999995	7.08568
12 h after dark	6.711443333333333	6.47076	6.913989999999999