A part
灯
Shown as a part of 2 words so far, read one way.
とう 2 words
- 蛍光灯けいこうとうfluorescent lamp
蛍光灯 · here “light”
- 灯油とうゆlamp oil, kerosene
灯油 · here “light”
Also written with 灯
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.