Tube Time on X: "here's a light bulb that is almost 120 years old! the filament is made out of carbon, and the glass is clear because they hadn't figured out how
Paulmann Rustika carbon filament lamp - a modern lamp largely identical in design and structure to original carbon filament lamps. Repro, modern Stock Photo - Alamy
Edison light bulb - Wikipedia
Carbon filament lamps, Diccionario general de Arquitectura e Ingenieria 1879 Wall Art, Canvas Prints, Framed Prints, Wall Peels | Great Big Canvas