The present invention discloses a prosthetic device for correcting deformity of the spine including a prosthetic device main body being inserted into an intervertebral disk, and having a variable height to correct deformity of the spine, and a control strip inserted into the prosthetic device main body, for controlling a height of the prosthetic device main body. A model computes a volume of influence region for a simulated electrical stimulation using certain stimulation parameters, such as amplitude, pulsewidth, frequency, pulse morphology, electrode contact selection or location, return path electrode selection, pulse polarity, etc. Using the guide data, a user is able to create, alter and unlock locks on the programming content. Efficient operation with high current loads and resulting high wall loading and temperatures is possible. The phosphor layer is disposed between the rear electrode layer and the pad and defines an illuminated region when energized by a first voltage.