These lamps work by creating an electric arc in a bulb filled with vaporized sodium. They're efficient and extremely bright. Some bulbs pump out 100 lumens per watt of power, which makes them way ...

Arc lamps provided many cities with their first ... incandescent lamps with tungsten filaments appear on the European market. These bulbs lasted longer, were brighter and more efficient than ...

Arc lights had issues ... You can see one of the oldest surviving Edison bulbs at the Port Huron Museum and in the video below. Many people worked on the problem throughout the 1800s.