Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. furnishings components
7. lighting device components
8. light bulbs
9. electric lamps (lighting device components)
10. electric discharge lamps
11. high-intensity discharge lamps

Narrower term/s

• high-pressure sodium lamps
• low-pressure sodium lamps

Anotations

Scope note:

High-intensity discharge lamps, highly efficient in terms of lumens produced per watt of current consumed, with one-color light (orange) making them unsuitable for general use; often used for street and highway lighting.