THE EVOLUTION OF LIGHTING

THE EVOLUTION OF LIGHTING KCL Engineering West Des Moines, Iowa Mike Lambert, IES, LC / Senior Lighting Designer (39) Years Lighting & Electrical ...
Author: Brian Hodge
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THE EVOLUTION OF LIGHTING

KCL Engineering

West Des Moines, Iowa

Mike Lambert, IES, LC / Senior Lighting Designer (39) Years Lighting & Electrical Industry Experience Projects in China, Hawaii, Las Vegas & other US locations

HISTORY OF LIGHT SOURCES LIGHTING METRICS VISION & HUMAN CENTRIC LIGHTING

HISTORY OF LIGHT SOURCES

EARTH’S DOMINANT SOURCES OF NATURAL LIGHT

HUMANS PRIMARILY USED FLAME SOURCES FROM 400,000 BC

END OF THE 19th CENTURY

ELECTRIC LIGHT SOURCES CARBON ARC DISCHARGE BRITAIN - HUMPHRY DAVY / ca.1801

USED FOR LARGE OUTDOOR AREA AND COMMERCIAL LIGHTING UNTIL 1900 SOLD INTO THE 1920’S FOR RESIDENTIAL USE AS A SUNLIGHT SUBSTITUTE A POTENTIAL FIRE HAZARD WITH SIGNIFICANT EXPOSURE TO ULTRAVIOLET RADIATION POSSIBLE

ELECTRIC LIGHT SOURCES MERCURY VAPOR DISCHARGE

BRITAIN – JOHN THOMAS WAY / ca.1860 UNITED STATES – PETER HEWITT COOPER / 1904 UNITED STATES – GEORGE INMAN / 1934

MUCH OF ITS ENERGY IS BELOW THE VISIBLE AT THE MERCURY RESONANCE LINE OF 254nm IS THE BASIS OF OPERATION FOR FLUORESCENT, NEON, SODIUM, METAL HALIDE AND OTHER DISCHARGE LAMPS EFFICIENCY AND COLOR IS IMPROVED BY THE ADDITION OF PHOPSHORS AND CHEMICALS

ELECTRIC LIGHT SOURCES INCANDESCENT FILAMENT BRITAIN - THOMAS SWAN / ca.1860 UNITED STATES – THOMAS EDISON / 1879

“INCANDESCENT” AND “CANDLE”