A lighting display system having an anti-theft feature has a mounting structure having at least one mounting plate having a front side and a back side, first and second conductor lines carried by the at least one mounting plate, and a plurality of luminescent bodies, wherein each of the plurality of luminescent bodies has first and second contact plugs exposed at a back side of the luminescent body and connected to the first and second conductor lines where a line extending between centres of the first and second contact plugs is oriented at an angle of more than 105° or less than 85° relative to a direction of extension of the first conductor line, and a plurality of light sources electrically connected to the first and second conductor lines via the first and second plugs and fixing members.