condition	mean	min	max
4 h after light	8.73571	8.66008	8.874889999999999
8 h after light	8.67254	8.55301	8.84693
12 h after light	8.64893	8.504389999999999	8.743210000000001
4 h after dark	8.46282	8.23352	8.70458
8 h after dark	8.485303333333334	8.466660000000001	8.51655
12 h after dark	8.19637	8.0855	8.253739999999999