What type of heat is from a light bulb?

The heat from a light bulb is primarily infrared radiation, which is a form of thermal energy. When electricity passes through the filament in incandescent bulbs, it heats up and emits both visible light and infrared radiation, resulting in heat. In other types of bulbs, such as LED or fluorescent, heat is generated through different mechanisms, but still primarily involves the emission of infrared radiation. Overall, this heat is a byproduct of the energy conversion process used to produce light.