condition	mean	min	max
4 h after light	6.81505	6.7362899999999994	6.95768
8 h after light	6.887453333333333	6.61185	7.25612
12 h after light	7.295743333333333	7.17278	7.38249
4 h after dark	7.41088	7.12886	7.66524
8 h after dark	8.08093	7.6566	8.52176
12 h after dark	8.032416666666666	7.89841	8.229519999999999