Evolution of Lighting

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70,000 years ago....

Man discovered fire accidently by rubbing stones


500 BC

Romans

Beeswax candles, wax candles etc...


1853

Lgnacy Lukasiewicz

Kerosene Fuel Lighting


1879

Thomas Edison

Incandescent Lights

10% Light
90%

1903

Peter Cooper Hewitt

Fluroscent lamps

40% light
60% Heat

1903

Peter Cooper Hewitt

Fluroscent lamps

80% light
20% Heat (danger)