A surface mount resistor includes a resistance body, a first protective layer, a heat-transfer layer, a second protective layer and two electrode layers. The data filter selects a set of template data from a set of statistical process data. Each of the stages includes a node controller for controlling a charging duration of a set node, and an output unit for outputting a corresponding one of the scan pulses through an output terminal for the charging duration of the set node. Energy for operating the light bar is provided by one or more of the power sources, depending on operating conditions of the light bar and each of the power sources.