Edison didn't invent the light bulb-he made it practical. Early lighting included unsafe limelight and blinding arc lamps. Edison tested thousands of filaments, even a beard hair, to improve bulb life. Others explored gas-based bulbs, leading to energy-saving lamps. Lasers, once Einstein's theory, became essential tech. Today, lighting innovations include invisible wavelengths and even laser therapy. What's next in the evolution of light? Hrají: Grub Smith, Dennis Heath Režie: Lee Thean-jeen, Mimi Soeteman, Karan Low Rok: 2012
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