蛍光灯けいこうとうCommonVariants蛍光灯けいこうとう蛍光燈けいこうとう螢光灯けいこうとう螢光燈けいこうとうMeaningsfluorescent lamp; fluorescent lightperson who is slow to react; someone slow on the uptakeKanji used蛍firefly光light灯a light