at the turn of the 20th century. They are easily identified by the long and complicated windings of their internal filaments, and by the very warm-yellow glow of the light they produce (many of the bulbs emit light at a color temperature of 2200-2400 K).

History

Light bulbs with a carbon filament were first demonstrated by Thomas Edison in October 1879. These carbon filament bulbs, the first electric light

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