condition	mean	min	max
4 h after light	6.671153333333334	6.60767	6.78483
8 h after light	6.590493333333334	6.51294	6.641830000000001
12 h after light	6.7478299999999996	6.702439999999999	6.7746699999999995
4 h after dark	6.72126	6.53608	6.8383
8 h after dark	6.784896666666667	6.7419199999999995	6.87038
12 h after dark	6.766483333333333	6.71812	6.80253