condition	mean	min	max
4 h after light	6.60377	6.54594	6.6658800000000005
8 h after light	6.755576666666666	6.69688	6.859089999999999
12 h after light	6.859016666666667	6.771210000000001	6.97577
4 h after dark	6.81344	6.736389999999999	6.852069999999999
8 h after dark	6.634903333333333	6.4684	6.788289999999999
12 h after dark	6.36006	6.31272	6.4324699999999995