arclight

arc +‎ light

arclight (plural arclights)

1. A lamp that produces light by generating an electric arc across an enclosed gas.
   • 1987, Martin Gilbert, The Holocaust

     With one, last desperate lurch, the lorry cleared the tracks, disappearing out of the arclights, into the darkness; and then there was silence...

   • 1998, Patrick Robinson, Nimitz Class

     All five had seen the four wooden targets, thirty feet above their heads, holding the great submarine in place, stark against the glare of the arclight...

   • 2000, James Burke, The Knowledge Web

     In 1809 Humphry Davy had made the first arclight by attaching a charcoal rod to each terminal of a Volta battery...