condition	mean	min	max
4 h after light	8.775123333333333	8.695889999999999	8.862589999999999
8 h after light	8.94293	8.86362	8.99114
12 h after light	8.767683333333332	8.63393	8.83733
4 h after dark	8.20293	7.9966800000000005	8.3952
8 h after dark	8.195746666666667	8.04955	8.27165
12 h after dark	8.361996666666666	8.33198	8.40472