lamp, a light, light, counter for lights
灯 centers on a source of light, especially a lamp or light fixture. It also serves as a counter for lights, extending naturally from the core idea of a lamp.
灯 is the modern simplified form of 燈. The older form combines 火 (fire) with 登, which likely contributed the sound and helped express a lamp or light. The modern form replaces 登 with 丁, which is a common simplification.
The left side is fire 火, and the right side 丁 looks like a nail or a stand. Picture a fire burning on a stand, making a lamp that gives light.
For トウ, imagine a toe touching the lamp: toe -> トウ, and the lamp lights up when your toe taps it.
light; lamp
lighting (a lamp); turning on a light
electric light
lighthouse
paper lantern; Chinese lantern; Japanese lantern
kerosene; paraffin; lamp oil
light; lamp
putting out the lights; turning off the lights
street light; streetlamp
to light (a candle, lamp, etc.); to turn on (a light)
light; lamplight
to be lit (e.g. candle, lamp, light bulb); to be lighted; to be burning
revolving lantern
garden lantern; hanging lantern
searchlight
paper-enclosed standing lantern; paper-covered wooden stand housing an oil lamp
light offered to a god or Buddha; votive light
light that stays on all night; lamp that is kept burning all night; nightlight
lighthouse keeper
precarious situation; precarious state