condition	mean	min	max
4 h after light	8.57	8.416839999999999	8.77685
8 h after light	8.586223333333333	8.32437	8.880239999999999
12 h after light	8.586813333333334	8.48443	8.7251
4 h after dark	8.35877	8.11149	8.78905
8 h after dark	8.462043333333334	8.44829	8.47308
12 h after dark	8.503713333333334	8.40382	8.63669