When the lamp with carbonized thread lasted for forty-five hours the staff at Menlo Park realized that they had had a breakthrough. Edison claimed, "none of us could go to bed, and there was no sleep for any of us for forty hours." In November 1879 they tried using carbonized cardboard, and soon they had created an experimental bulb that was superior to any of the others they had tested.On New Year's Eve, the Menlo Park facility was swarmed by the press, on- lookers, and Edison's financiers, all eager to see the new invention. Edison enthralled the visitors by lighting forty light bulbs all at once, then switching them on and off. The real work, however, consisted in creating a system that was inexpensive and practical: true innovation lay in lighting on a much larger scale, which required generator systems and safety fuse technology.
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Menlo Park, new invention. Edison, Menlo Park facility, safety fuse technology, gas lighting systems.