What type of energy do light bulbs produce?

Light bulbs primarily produce light energy as they convert electrical energy into light. When electricity flows through the filament of an incandescent bulb or through gas in a fluorescent bulb, the energy is transformed into light radiation, which is what we see as illumination. This process is essential for lighting homes, streets, and other areas.

While some light bulbs also generate heat due to inefficiencies in the conversion process, the main purpose of a light bulb is to provide light, making light energy the most accurate answer in the context of what they are designed to do.