lightbulb

Screws into socket

A lightbulb is a glass enclosure containing a filament or gas that produces light when electricity passes through it.

The term extends to any similar device: LED bulbs, fluorescent tubes.

A lightbulb appearing above someone's head in cartoons represents sudden inspiration—hence lightbulb moment for a flash of insight or realization.

illumination

filament

Very thin thread

LED · fluorescent · halogen · watt · lumen · brightness · socket · bayonet · lamp · fixture

electrical

current

Directed flow of charge

power · wire · outlet · electricity · switch · ballast · transformer · AC · DC · energy-efficient

idea

eureka

Discovery triumph cry

breakthrough · invention · innovation · aha · epiphany · creativity · concept · solution · thought · genius

Categories
Opposites
light source type

lightbulbcandle

Wax stick with wick

torch · oil lamp · kerosene lamp · tallow candle · rushlight

illumination vs. darkness

lightbulbdarkness

Total absence of light

shade · blackout curtain · shadow · blackout · dark

Phrases
Family

lightbulbs

Familiarity
Top 20,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G