condition	mean	min	max
4 h after light	4.26643	4.183269999999999	4.32167
8 h after light	4.279143333333333	4.15156	4.389069999999999
12 h after light	4.2171	4.18886	4.23902
4 h after dark	4.259176666666667	4.17403	4.33622
8 h after dark	4.17209	4.10663	4.25847
12 h after dark	4.2514	4.20454	4.33816