TIL the world's longest burning light bulb was installed in 1901 and has been glowing for over 110 years straight. It has a carbon filament that is eight times thicker than a
Paulmann Rustika carbon filament lamp - a modern lamp largely identical in design and structure to original carbon filament lamps. Repro, modern Stock Photo - Alamy
Carbon Filament Bulb Manufacturer,Supplier and Exporter from India