Systems and methods for controlling access to resources using spoken Completely Automatic Public Turing Tests To Tell Humans And Computers Apart tests are disclosed. The first metal base plate has a first main bead, and first outer and inner sub-bead sections formed outside and inside the first main bead and projecting outwardly in a direction opposite to the first main bead. The section of the light distribution body adjacent to the non-glowing light source has an elliptical section as an envelope curve in at least one cutting plane, which encompasses the optic axis.