3645 Residential Electric Lighting Fixtures Establishments primarily engaged in manufacturing residential electric lighting fixtures and equipment, fixed or portable. Establishments primarily engaged in producing glassware for lighting fixtures are classified in major group 32; those manufacturing electric light bulbs, tubes, and related light sources are classified in industry 3641; those manufacturing lamp shades, except glass and metal, are classified in industry 3999; and those manufacturing nonelectric fixtures and portable electric flashlights, lanterns, and similar lamps are classified in industry 3648.