Light bulb Light bulb Iconic representation of knowledge or idea. knowledge, idea, illumination, concept 2012-08-01 image/svg+xml Light bulb 2012-08-01 Integration and Application Network https://ian.umces.edu/media-library/light-bulb/ https://ian.umces.edu/media-library/light-bulb/ en-US knowledge, idea, illumination, concept Iconic representation of knowledge or idea.