condition	mean	min	max
4 h after light	7.50307	7.4501	7.59506
8 h after light	7.555513333333333	7.483689999999999	7.64065
12 h after light	7.203586666666666	7.0773	7.40119
4 h after dark	7.29349	7.148560000000001	7.3883399999999995
8 h after dark	7.151133333333333	6.9748399999999995	7.364139999999999
12 h after dark	7.28011	7.065739999999999	7.52044