condition	mean	min	max
4 h after light	7.091163333333333	6.9809399999999995	7.1760600000000005
8 h after light	6.822953333333333	6.77464	6.90107
12 h after light	6.90538	6.63698	7.093560000000001
4 h after dark	7.9235766666666665	7.59768	8.12776
8 h after dark	7.864446666666666	7.681769999999999	7.98273
12 h after dark	7.8479399999999995	7.647810000000001	7.998939999999999