condition	mean	min	max
4 h after light	6.3705533333333335	6.06736	6.532780000000001
8 h after light	6.26919	5.68869	6.67542
12 h after light	6.1319333333333335	5.79128	6.6288100000000005
4 h after dark	5.950313333333334	5.5075400000000005	6.30986
8 h after dark	5.723393333333333	5.54285	5.8156300000000005
12 h after dark	5.71034	5.45541	5.913130000000001