To comply with new laws on reducing energy usage, fluorescent and HID lighting systems — both examples of arc discharge lamps — have become more complex and varied in their performance. To understand ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. A 6-pin brass base with fiber ...

An early carbon arc lamp using two flat plates instead of the more common design using two rods. Touching the plates and then retracting them slightly initiates the arc as usual. The arc travels ...