Like all revolutionary inventions, the very first light bulb too was developed after a series of improvements had been made over the ideas generated by earlier inventors. So light bulbs in some rudimentary form existed before Thomas Alva Edison patented his light bulb, the one that resembles the ...
High-intensity discharge (HID) lamps have been around for more than 100 years now. Earlier known as gas discharge chambers, HID light sources emit light by vaporizing metallic salts inside the electric arc chamber. HID lamps emit more light watt-by-watt compared to a conventional ...
