condition	mean	min	max
4 h after light	5.264795	5.0467	5.48289
8 h after light	5.681705	5.40147	5.96194
12 h after light	5.299195	5.06595	5.53244
4 h after dark	6.913525	6.80107	7.02598
8 h after dark	6.337145	5.82661	6.84768
12 h after dark	7.170185	7.07554	7.26483