condition	mean	min	max
4 h after light	9.243335	6.38837	12.0983
8 h after light	15.7048	15.5372	15.8724
12 h after light	17.987949999999998	17.5043	18.4716
4 h after dark	12.0877	11.2841	12.908
8 h after dark	12.659	10.3379	13.9876
12 h after dark	7.543193333333333	6.47562	8.5481