condition	mean	min	max
4 h after light	7.6188495	7.29198	7.945719
8 h after light	7.6458305	7.29198	7.999681
12 h after light	7.0127785	6.83557	7.189987
4 h after dark	7.3324805	7.256491	7.40847
8 h after dark	7.2901935	6.759932	7.820455
12 h after dark	7.133605	7.133605	7.133605