In 1933 the introduction of the AnglePoise Lamp was the first to allow lighting to be redirected through using springs to hold the lamp in various positions. This proved ingenious and useful and continues to be produced today.
George Carwardine, 1887-1948, an engineer found that his explorations with springs could be fittingly applied to lighting to provide flexible positioning that stays in place once adjusted.
History of the AnglePoise Lamp
In 1972, Richard Sapper introduced the Trizio Lamp. Its mordern aesthetic proved appealing for home and office to a generation of successful business types that appreciated its clean lines and minimalist leanings. Sapper brought a few new twists to the desk lamp: a halogen light element, armiture used to conduct electricity and counter weights to fix the lamp in position.
Richard Sapper Interviewed
This leads to the question of what is the next step in task lighting and what will reflect the sensibilities of the 21st century?