A system and method for forming a conductive pattern. Each data buffer has n number of data elements. The lamp operating state is based on the rotational position of the head portion with respect to the body. The material and thicknesses of the substrates and lead frames are selected so stress experienced by the electronic devices caused by changes in temperature of the assembly are balanced from the center of the assembly, thereby eliminating the need for balancing stresses at a substrate level by applying substantially matching metal layers to both sides of the substrates. The locking device is supported on the grooved bushing, protruding upwards beyond the loading surface, in a second position.