An illumination device and methods are provided herein for avoiding over-current and over-power conditions in one or more power converters included within the illumination device. This method comprises extra buffer memory than does a typical three-dimensional graphics display system. The interference cancellation stage process has been carried out by cascade-connecting several circuits performing the same process in a multi-stage interference-canceling device. The optimizing step may result in a recommendation to decommission redundant applications. At ground level the base plate of each prefabricated panel is welded to an elongated plate embedded in the concrete foundation. After packets enter said router, a packet retransmission processing unit acquires a characteristic values and messages calculated from each characteristic value of a packet for obtaining the order, size, header, and check bits for assisting in identifying packets, and stores the characteristic values with a link list for saving memory utility.