condition	mean	min	max
4 h after light	8.889683333333334	8.810960000000001	8.93627
8 h after light	8.75463	8.68465	8.879010000000001
12 h after light	8.86679	8.63428	8.9916
4 h after dark	8.914793333333332	8.62277	9.087019999999999
8 h after dark	8.858163333333334	8.56435	9.08525
12 h after dark	8.72576	8.62007	8.869019999999999