Lighting · Recorded milestone
Tungsten-filament bulb
Recorded year1904
Sandor Just and Franjo Hanaman's tungsten filament, sold by Tungsram, glows brighter and lasts longer than Edison's carbon threads.
Explore this milestone on the interactive mapBuilt on
Led to
Sources & evidence
Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.