Newcastle, England and Menlo Park, New Jersey, United States
Associated with
Humphry Davy
Demonstrated an electric arc light in the early 1800s
Joseph Swan
English physicist and chemist; developed an incandescent carbon-filament lamp
Thomas Edison
Led the Menlo Park team that produced a practical lamp and electrical system
Lewis Latimer
Draftsman and inventor who patented an improved carbon filament process in 1881
William D. Coolidge
Developed ductile tungsten filaments at General Electric in 1910
Illustrative photograph, not the original artifact. Photograph: freestocks.org / Pexels
About this date
Joseph Swan demonstrated a carbon-filament lamp in 1878–79 and Thomas Edison’s team produced a long-lasting version in October 1879. Edison’s Pearl Street Station began operating on 4 September 1882.
About credit
Dozens of inventors worked on electric light. Edison and Swan both made practical lamps and merged their British interests in 1883. Claims for earlier inventors, such as Heinrich Göbel, are not supported by historians.
Chapter II
The world before
Nights ruled by flame
Homes and streets were lit by candles, oil lamps and, from the early 19th century, gas. All involved open flames, smoke, heat and fire risk.
Lighting was costly. Working or reading after dark was a luxury and most people organised their days around sunlight.
II
The human achievement
Not one bulb, but a whole system
Arc lamps, demonstrated by Humphry Davy in the early 1800s, were too bright and harsh for homes. The challenge was a small, gentle, long-lasting lamp, and a system to supply it.
In England, Joseph Swan worked with carbon filaments in evacuated glass bulbs and demonstrated lamps in 1878–79. In the United States, Thomas Edison’s Menlo Park laboratory tested thousands of materials, producing a lamp with a carbon filament that burned for many hours in October 1879, and later bamboo-based filaments.
Edison’s team also developed dynamos, wiring, meters and sockets. On 4 September 1882 the Pearl Street Station in New York began supplying electricity to customers. Lewis Latimer, a Black draftsman and inventor, patented a method of making carbon filaments in 1881 and helped write patents and supervise installation of lighting.
III
Understanding the invention
How it works
An incandescent bulb makes light by making something very hot.
01
Step 01 of 04
Current meets resistance
Electricity flowing through a thin filament meets resistance, which converts electrical energy into heat.
Current meets resistance
The filament glows
The bulb protects it
A better filament lasts longer
IV
The transformation
What changed for humanity
Working life
Factories could run shifts after dark. Offices, shops and theatres were able to keep later hours.
Public safety
Electric street lighting reduced fire risk compared with gas and made streets easier to move through at night.
Home
Electrification brought a cascade of new household technologies, from irons to refrigerators.
Infrastructure
Power stations, grids and meters grew into one of the largest engineering systems in history.
Light became cheap, clean and available at the flick of a switch. Evening hours could be used for work, study and leisure; streets and factories became safer.
V
Before and after
Life before and after The Light Bulb
Before
By candle or oil lamp, dim and flickering.
After
By a steady electric lamp with no smoke.
On larger screens, drag the divider (or use the arrow keys) to give more room to the world before or after.
Edison noticed in 1883 that current could cross a vacuum from a heated filament. John Ambrose Fleming turned this effect into the vacuum-tube diode in 1904, and tubes powered early computers.
Early power stations used steam engines, and steam turbines remain central to generating power.
Beyond the collection
LEDs
Light-emitting diodes now produce the same light with a fraction of the energy.
Beyond the collection
The power grid
The need to supply lamps led to the networks that now supply almost every device.
VII
Human stories
The people and the moments
Thousands of materials
Edison’s team tested a vast range of filament materials before settling on carbonised bamboo for a time. The work of the laboratory, not just one man, produced the lamp.
Lewis Latimer’s contribution
The son of formerly enslaved parents, Latimer taught himself drafting and became an inventor and patent expert. His 1881 patent for making carbon filaments helped make bulbs longer-lived and cheaper.
Where accounts differ, this museum follows the documented record and says so.
