Oblon, Fisher, Spivak, McClelland & Maier
Lighting equipment
 A lighting equipment comprises a high pressure metal vapor discharge lamp having a lamp voltage of 145 to 180 V actuated by a lag type ballast supplied with a voltage of lower than 220 V or a high pressure metal vapor discharge lamp having a lamp voltage of 150 to 200 V actuated by a lag type ballast supplied with a voltage of higher than 220 V whereby a consumed power is reduced in comparison with the conventional lighting device. 
Mitsubishi Denki Kabushiki Kaisha
Y H H
Y10S H01J H01J
additional inventional inventional
Masato Michihiro Keiichi Yusaku
Saito Tsuchihashi Baba Matsushima