condition	mean	min	max
4 h after light	6.837446666666667	6.77775	6.87339
8 h after light	6.65664	6.52262	6.9027199999999995
12 h after light	6.7083200000000005	6.62552	6.805560000000001
4 h after dark	6.874803333333333	6.805460000000001	6.937939999999999
8 h after dark	6.9799	6.88497	7.151339999999999
12 h after dark	7.174446666666667	6.90995	7.328880000000001