Heating bulbs in a food dehydrator are **electric heat-emitting lamps** that serve as the **primary heat source** for drying food. They work the same way heat lamps do in poultry brooders or bathroom warmers, except they’re used in a controlled drying chamber.

### What they do:

* **Generate heat** that raises the internal temperature of the dehydrator.

* **Support moisture removal** by warming the food so water evaporates from its surface.

* Used together with **fans**, they help maintain consistent airflow and drying rate.

Heating Bulbs | Heating Elements/Coils |

|

| Simple to install and replace | Can be harder to replace |

|Low initial cost | Usually more expensive |

| Heat may be less uniform without proper airflow | More stable temperature control |

### Things to note:

* They get **very hot**, so proper shielding and wiring is critical.

* They work best in **small/medium dehydrators**; larger units often use heating coils because they provide stronger, more even heat.