condition	mean	min	max
4 h after light	6.853823333333334	6.654730000000001	7.209410000000001
8 h after light	6.6953499999999995	6.45792	6.888319999999999
12 h after light	6.6343266666666665	6.51693	6.78822
4 h after dark	6.530686666666666	6.43852	6.624639999999999
8 h after dark	6.57278	6.41683	6.75436
12 h after dark	6.739093333333334	6.55368	6.84497