hat
premye vòltaj etensèl-sou nan fènwa (V) <275 <375 <410 <435 <470 <530 <590 <710 <870 <930
eng
first spark-over voltage in darkness (V) < 145 <180 < 275 < 350 < 375 < 410 < 435 < 470 < 530 < 590 < 650 < 710 < 870 < 930