Meaning of 蛍光灯 in Japanese

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Definition of 蛍光灯

けいこうとう(keikoutou) 【蛍光灯 ·蛍光燈 ·螢光灯 ·螢光燈】

(n) fluorescent lamp; fluorescent light
蛍光灯がチカチカしてるな。新しいのと交換しないとダメかな。
This fluorescent lamp is starting to flicker. We'll have to replace it.
person who is slow to react; someone slow on the uptake
ハリーは本当に蛍光灯だね。
Harry's really slow to catch on.

ハリーは本当に蛍光灯けいこうとうだね。

Harry's really slow to catch on.

そこの蛍光灯けいこうとうを交換こうかんしするないといけない。

I must replace that fluorescent lamp.