condition	mean	min	max
4 h after light	6.34398	5.913930000000001	6.68439
8 h after light	6.7052	6.5339599999999995	7.037139999999999
12 h after light	6.779563333333333	6.630539999999999	6.92069
4 h after dark	6.831286666666666	6.68535	6.989269999999999
8 h after dark	6.566883333333333	6.17734	6.78348
12 h after dark	6.4791	6.0182	6.841889999999999