A uniform light generating system for testing an image-sensing device includes a light-generating unit, a light-transmitting unit, a light-diffusing unit, and a lens unit. The striker pin has a driven end and an impact end and a longitudinal axis extending between the two ends. The composition is used in a method to form a passivation layer on the conductive material layer, abrading the passivation layer to expose a portion of the conductive material layer, applying a bias to the substrate, and removing the conductive material layer. A variable flow blower provides premixed combustion air and fuel gas to the burner at a controlled blower flow rate within a blower flow rate range. A recorder is arranged to record the mixed data on a medium, whereby the medium can be played either using a multichannel player device or a reduced channel player device by using said coefficient.