condition	mean	min	max
4 h after light	8.638605	8.62922	8.64799
8 h after light	8.263125	7.93522	8.59103
12 h after light	7.0675	6.57479	7.56021
4 h after dark	12.40305	11.0456	13.7605
8 h after dark	17.0471	16.6338	17.4604
12 h after dark	14.5903	13.5319	15.6487