condition	mean	min	max
4 h after light	6.564293333333333	6.29942	6.7929699999999995
8 h after light	6.64051	6.30057	6.940589999999999
12 h after light	6.83828	6.72019	6.93255
4 h after dark	6.72347	6.663119999999999	6.8441600000000005
8 h after dark	6.7242533333333325	6.556489999999999	7.0140199999999995
12 h after dark	6.77897	6.64395	6.93423