condition	mean	min	max
4 h after light	6.55072	6.19245	6.831980000000001
8 h after light	6.631316666666667	6.46445	6.79495
12 h after light	6.68097	6.596660000000001	6.773280000000001
4 h after dark	6.713493333333333	6.66193	6.74815
8 h after dark	6.525883333333333	6.37003	6.694389999999999
12 h after dark	6.4910266666666665	6.25001	6.618639999999999