Add a dash of acetic acid, it will keep mold away and lower the pH to match honey's. Randy Oliver has written about this in ABJ. Smells like pickled herring though...I feed 2:1 sugar syrup as the 1:1 can spoil.
I prefer feeding C & H brand sucrose over sugar beet sucrose.
Raw sugar has lots of solids that make it difficult for the bees to process. Refined sugar is the best to use.is it ok to use "sugar in the raw"?