A lamp apparatus comprising: a base; a pair of standoffs; a bulb; and a semiconductor light emitting apparatus, comprising: an elongated hollow wavelength conversion tube that comprises an elongated wavelength conversion tube wall having wavelength conversion material dispersed therein; and a packaged semiconductor light emitting device comprising a mounting substrate, a dome on the mounting substrate and a semiconductor light emitting die that is located between the mounting substrate and the dome, the packaged semiconductor light emitting device being oriented such that the dome extends into an end of the elongated hollow wavelength conversation tube, the mounting substrate providing an end cap for the end of the elongated hollow wavelength conversion tube, and the semiconductor light emitting die being oriented to emit light through the dome to inside the elongated hollow wavelength conversion tube to impinge upon the elongated wavelength conversion tube wall and the wavelength conversion material dispersed therein; and wherein the pair of standoffs maintain the elongated hollow wavelength conversion tube and the semiconductor light emitting device spaced apart from the base, the bulb is connected to the base and surrounds the pair of standoffs, the hollow wavelength conversion tube and the semiconductor light emitting device and the lamp further comprises voltage conversion circuits for the semiconductor light emitting apparatus. a base; a pair of standoffs; a bulb; and a semiconductor light emitting apparatus, comprising: an elongated hollow wavelength conversion tube that comprises an elongated wavelength conversion tube wall having wavelength conversion material dispersed therein; and a packaged semiconductor light emitting device comprising a mounting substrate, a dome on the mounting substrate and a semiconductor light emitting die that is located between the mounting substrate and the dome, the packaged semiconductor light emitting device being oriented such that the dome extends into an end of the elongated hollow wavelength conversation tube, the mounting substrate providing an end cap for the end of the elongated hollow wavelength conversion tube, and the semiconductor light emitting die being oriented to emit light through the dome to inside the elongated hollow wavelength conversion tube to impinge upon the elongated wavelength conversion tube wall and the wavelength conversion material dispersed therein; and wherein the pair of standoffs maintain the elongated hollow wavelength conversion tube and the semiconductor light emitting device spaced apart from the base, the bulb is connected to the base and surrounds the pair of standoffs, the hollow wavelength conversion tube and the semiconductor light emitting device and the lamp further comprises voltage conversion circuits for the semiconductor light emitting apparatus. an elongated hollow wavelength conversion tube that comprises an elongated wavelength conversion tube wall having wavelength conversion material dispersed therein; and a packaged semiconductor light emitting device comprising a mounting substrate, a dome on the mounting substrate and a semiconductor light emitting die that is located between the mounting substrate and the dome, the packaged semiconductor light emitting device being oriented such that the dome extends into an end of the elongated hollow wavelength conversation tube, the mounting substrate providing an end cap for the end of the elongated hollow wavelength conversion tube, and the semiconductor light emitting die being oriented to emit light through the dome to inside the elongated hollow wavelength conversion tube to impinge upon the elongated wavelength conversion tube wall and the wavelength conversion material dispersed therein; and wherein the pair of standoffs maintain the elongated hollow wavelength conversion tube and the semiconductor light emitting device spaced apart from the base, the bulb is connected to the base and surrounds the pair of standoffs, the hollow wavelength conversion tube and the semiconductor light emitting device and the lamp further comprises voltage conversion circuits for the semiconductor light emitting apparatus.