The Collaborative International Dictionary of English v.0.48:

droplight \drop"light`\, n.
   An electric or gas light suspended from the ceiling by a
   flexible cord or tube, allowing artificial light to be
   brought down from a chandelier nearer to a table or desk; a
   pendant; also, an electric light bulb in a small holder,
   which can be held in the hand or hung from a hook, and
   attached to a long electric cord, allowing light to be
   brought close to work in dark areas of a room. Dropmeal