Heatable electrode for high-pressure gas discharge lamps
High intensity vapor discharge lamp with sintering aids for elec
High-pressure discharge lamp
High-pressure discharge lamp with torsionally wound electrode st
High-pressure discharge lamp with torsionally wound electrode st
High-pressure gas discharge lamp having electrodes with coil lay
High-pressure gas discharge lamp having tubular electrodes
High-pressure gas discharge lamp having tubular electrodes
High-pressure metal vapor arc lamp lit by direct current power s
High-pressure sodium vapor discharge lamp