Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Furnishings (hierarchy name)
5. furnishings (works)
6. [furnishings by form or function]
7. lighting devices
8. [lighting devices by form]
9. lamps (lighting devices)
10. [lamps by method of illumination]
11. electric lamps (lighting device forms)

Anotations

Scope note:

Lighting devices comprised of a housing, ballast, and connection to electrical power that mount tubular electric discharge lamps, or 'bulbs,' in which ionization of mercury vapor produces radiation that activates the fluorescent coating on the inner surface of the glass.