condition	mean	min	max
4 h after light	6.99066	6.9377	7.0454
8 h after light	7.01255	6.92905	7.11189
12 h after light	6.9499466666666665	6.87873	7.035360000000001
4 h after dark	6.71479	6.663469999999999	6.775119999999999
8 h after dark	6.677526666666667	6.55658	6.784160000000001
12 h after dark	6.597146666666666	6.39271	6.835839999999999