condition	mean	min	max
4 h after light	7.106606666666666	6.97963	7.26685
8 h after light	7.1966833333333335	7.040260000000001	7.443969999999999
12 h after light	7.4008400000000005	7.21404	7.626
4 h after dark	7.19599	6.74823	7.56548
8 h after dark	7.02648	6.82408	7.3345899999999995
12 h after dark	6.909206666666666	6.80048	7.1217