Power source unit and lighting fixture

摘要

According to one embodiment, there is provided a lighting fixture including a fixture body, straight-tube type LED lamps each having semiconductor light emitting elements, and a dedicated power source for lighting the semiconductor light emitting elements. The dedicatedpower source outputs current having a trapezoidal waveform a period of a peak portion of which is 54% or more of one cycle, and thus lights the semiconductor light emitting elements.