condition	mean	min	max
4 h after light	6.809259999999999	6.53795	7.156789999999999
8 h after light	6.599496666666667	6.46865	6.680280000000001
12 h after light	6.561706666666667	6.19123	7.01435
4 h after dark	6.611196666666666	6.596030000000001	6.626239999999999
8 h after dark	6.614936666666666	6.3191	6.835089999999999
12 h after dark	6.75664	6.56018	7.14297