Tube🏳️🌈Time on Twitter: "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 to
Paulmann Rustika carbon filament lamp - a modern lamp largely identical in design and structure to original carbon filament lamps. Repro, modern Stock Photo - Alamy
The Resurgence of Carbon Filament Bulbs - Eurolux Lighting
Carbon Filament Light Bulb Body Material: Ceramic at Best Price in Anand | Shree Harsiddhi Electric