condition	mean	min	max
4 h after light	7.8306000000000004	7.64918	7.92581
8 h after light	7.88246	7.719339999999999	8.18193
12 h after light	8.082009999999999	7.851039999999999	8.306239999999999
4 h after dark	7.87559	7.6264	8.14398
8 h after dark	7.849943333333333	7.70441	8.01629
12 h after dark	7.6702433333333335	7.47043	7.86057