A light bulb, as screwed into a lamp to light a room. Depicted as an incandescent bulb with a silver base, often shown with filament and a soft, yellow-white glow.
Commonly used to represent ideas (as over a head in a cartoon), thinking, and learning, often as paired with ? Thinking Face or ? Thought Balloon. May also represent various senses of light and brightness.
Light Bulb was approved as part of Unicode 6.0 in 2010 under the name “Electric Light Bulb” and added to Emoji 1.0 in 2015.
U+1F4A1
? Electric light bulb