As far as I know all sugar syrup do stimulate the bees,including the bees wax glands so comb production.In my opinion 1:1 sugar syrup is similar to nectar gather by bees and you can call it "artificial nectar".The strenth of sugar syrup -in my opinion-depends on the season you feed your bees and for what are you looking for:brood rearing -in the spring,or winter stores-in the autumn.
George