condition	mean	min	max
4 h after light	5.99657	5.91734	6.06
8 h after light	6.0982666666666665	5.91881	6.38984
12 h after light	6.081736666666667	5.95883	6.2859
4 h after dark	6.002973333333333	5.7308900000000005	6.34921
8 h after dark	6.12852	5.938619999999999	6.45695
12 h after dark	5.9285	5.7973	6.1406