蛍光管 けいこうかん Meanings Noun fluorescent tube See also: 真空蛍光管 (しんくうけいこうかん). Kanji 蛍 firefly. Read as ケイ. 光 light. Read as コウ. 管 administer. Read as カン. Words containing 蛍光管 真空蛍光管 (しんくうけいこうかん) vacuum fluorescent tube Jinuma: Japanese Dictionary · Word lists