What were some of Thomas Edison hypothesis on his experiment?

Thomas Edison proposed several hypotheses throughout his experiments, particularly in the development of the electric light bulb. He hypothesized that a carbon filament could produce a long-lasting light when heated in a vacuum, which led to his extensive testing of different materials for filaments. Additionally, he believed that the arrangement and design of the bulb itself could enhance the efficiency and lifespan of the light produced. These hypotheses guided his systematic experimentation and ultimately contributed to his successful invention of the practical incandescent light bulb.