condition	mean	min	max
4 h after light	6.79169	6.66277	6.94487
8 h after light	6.8462700000000005	6.50718	7.1692800000000005
12 h after light	6.821953333333333	6.617719999999999	6.95995
4 h after dark	6.68259	6.43544	6.948910000000001
8 h after dark	6.424763333333333	6.27136	6.592739999999999
12 h after dark	6.467286666666666	6.41284	6.51239