A transflector is described which increases efficiency and brightness under both ambient and supplemental lighting conditions in visual display applications. An amount of fuel supplied to the engine is controlled by changing a fuel injection period of said fuel injection valve, and performing a fuel injection with a plurality of injection modes including a reference injection mode. Increased expression of this or substantially similar genes can produce plants with improved nitrogen utilization and increased yield. The spiral conduit comprises a cross-section that increases progressively from the input to the output. The walking beam is rigidly attached to the axles and is pivotally coupled to a frame of the vehicle at a location intermediate of the first and second axles. The method includes turning off the switching element so that the output voltage of the voltage regulator is set at a preset power supply voltage for enabling the at least one particular circuit, and turning on the switching element so that the output voltage of the voltage regulator is reduced to a predetermined voltage lower than the preset power supply voltage.