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History
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Incandescent light bulbs with carbon filaments (left) and the modern tungsten bulb (right)
Incandescent light bulbs with carbon filaments (left) and the modern tungsten bulb (right)
Tungsram H2 radio transmitter tube prototype 1916
Tungsram H2 radio transmitter tube prototype 1916
Tungsram commercial vacuum tubes from the 1970s
Tungsram commercial vacuum tubes from the 1970s
Tungsram vacuum tubes
Tungsram vacuum tubes
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A scanning electron microscope image of the tungsten filament of an incandescent light bulb
A scanning electron microscope image of the tungsten filament of an incandescent light bulb
Elaborate light in Denver, Colorado
Elaborate light in Denver, Colorado
Original carbon-filament bulb from Thomas Edison's shop in Menlo Park
Original carbon-filament bulb from Thomas Edison's shop in Menlo Park
Alexander Lodygin on 1951 Soviet postal stamp
Alexander Lodygin on 1951 Soviet postal stamp