condition	mean	min	max
4 h after light	17.0985	16.2973	17.8997
8 h after light	10.74325	10.0265	11.46
12 h after light	6.784275	5.87913	7.68942
4 h after dark	8.444753333333333	7.87214	9.13378
8 h after dark	5.28167	4.6841	6.06836
12 h after dark	9.84597	8.36441	11.0452