Code 3190 and Code 3191 “Electric Lighting Fixture, Lantern or Lamp Mfg. – All Other Operations” are basically companion classifications and are only to be assigned to the same employee if an employer is performing both operations.  However, Code 3190 can also be assigned without Code 3191 if the employer receives or purchases electric lighting fixture, lantern or lamp parts from others and assembles the parts into completed electric  fixtures, lanterns or lamps.

Code 3190 applies to employers engaged in assembling electric lighting fixtures, lamps or lanterns from parts manufactured by others.  This classification does not include manufacturing electric lighting fixtures, lamps or lantern parts.  However, if the employer also manufactures the parts in addition to assembly operations, Code 3191 “Electric Lighting Fixture, Lantern or Lamp Mfg. – All Other Operations” shall also apply.  
  
The lamp, lantern or lighting fixture parts such as metal housings, sockets, covers, ballasts, circuit boards, switches, lamp bases, glass parts, chandelier parts, plugs, wiring or other electrical parts are assembled with screws, locknuts, washers or may be welded or soldered together depending on the type of process and type of electric lighting fixture that is being assembled.   
 
This classification includes finishing operations such as plastering, polishing, painting or lacquering.