condition	mean	min	max
4 h after light	6.7798799999999995	6.6291199999999995	7.0126
8 h after light	7.454596666666666	7.253189999999999	7.653060000000001
12 h after light	7.15515	6.97767	7.332039999999999
4 h after dark	6.712316666666666	6.54263	6.83378
8 h after dark	6.53685	6.27318	6.675789999999999
12 h after dark	6.280936666666666	6.07036	6.440919999999999