Definition
Producing light by heating a filament (typically tungsten) until it glows. Incandescent bulbs emit a warm white light across a broad spectrum but are relatively inefficient, generating significant heat and having shorter service life than LED alternatives.
Plain English
A traditional light bulb that glows because a thin wire inside it gets hot enough to give off light.
Context Anchor
Seen in pilot equipment discussions about flashlights, cockpit lighting, and other small electric lights used around the aircraft.
Derivation
From the Latin 'incandescere,' meaning 'to become hot' or 'to glow white.' The word captures exactly how the bulb works: something gets so hot it begins to glow.
Why Pilots Care
Pilots choose flashlights and cockpit lighting carefully. Incandescent bulbs run hot, drain batteries faster, and burn out more easily than LEDs, which matters during a night flight when a failed flashlight can leave you unable to read charts or checklists.
Intuition Check
Incandescent does not just mean “bright.” In this context, it means the light is made by heat: a small part inside the bulb gets hot enough to glow.
Example Sentence 1
She replaced the incandescent flashlight in her flight bag with an LED model to get longer battery life on night cross-country flights.
Example Sentence 2
Older aircraft often use incandescent lights for panel illumination because they provide steady output without electronic drivers.