The device that uses heat to produce light is an incandescent light bulb.

Here's how it works:

* Filament: An incandescent bulb has a thin wire filament made of tungsten inside.

* Electricity: When electricity flows through the filament, it heats up.

* Heat and Light: As the filament gets extremely hot, it glows brightly, producing light.

While incandescent bulbs are being replaced by more energy-efficient options, they were the primary source of light for many years.