condition	mean	min	max
4 h after light	7.984933333333333	7.911160000000001	8.0429
8 h after light	8.066559999999999	7.85836	8.18055
12 h after light	8.272283333333332	8.00354	8.51896
4 h after dark	8.165806666666667	7.99282	8.46663
8 h after dark	7.87451	7.689139999999999	8.09651
12 h after dark	7.97394	7.92767	8.00314