Huge Variety of Usual and Unusual LaptopsDuring the first nine years in which lightbulbs were manufactured, their filaments were made from bamboo fibers which were carbonized. Thomas Edison not only invented the first practical lightbulb, but at the same time came up with all the infrastructure needed to support commercial application of lightbulbs – a new kind of generator, and parallel wiring for reliabble energy distribution. It took Nikola Tesla, however, to introduce alternating current (AC) so that lights could be lit long distances from the generating stations. AC can be converted to high voltages for efficient transport, and then stepped back down for safe usage.
