"Swan's carbon rod lamp and carbon filament lamp, while functional, were still relatively impractical due to low resistance (needing very expensive thick copper wiring) and short running life."
It also mentions the high current.
As I remarked, Edison's breakthrough was the thin-filament high voltage, low current lamp, which made it practical.
"Swan's carbon rod lamp and carbon filament lamp, while functional, were still relatively impractical due to low resistance (needing very expensive thick copper wiring) and short running life."
It also mentions the high current.
As I remarked, Edison's breakthrough was the thin-filament high voltage, low current lamp, which made it practical.