Answer:
The very first commercial Edison electric incandescent light installation took place on the S.S. Columbia in 1880.
This ocean going vessel installation employed use of a first form "1880 Wire Terminal Base" wood socket and carbon filament incandescent bulb. At first the S.S. Columbia's electrical sockets were connected to the newly installed electric dynamo by a pair of cloth braided copper wire to a threaded hollow brass tubular bracket arm like those used in standard gas illuminating fixtures of the day. Through this carried the two electrical wires down to the turned wood and metal fitted socket and terminal points leading to the carbon filament first form electric "Wire-Terminal Base" Edison incandescent bulb.