condition	mean	min	max
4 h after light	4.09734	4.02522	4.14485
8 h after light	4.109093333333334	4.085380000000001	4.15036
12 h after light	3.9972333333333334	3.92236	4.0944
4 h after dark	4.06807	4.01924	4.09708
8 h after dark	4.154063333333333	4.08153	4.19064
12 h after dark	4.17757	4.03575	4.30676