light ballast
Học thuậtThân thiện
Definition
Noun: * An electrical device used to provide the necessary starting voltage and then to limit the operating current for fluorescent and discharge lamps. It ensures the lamp starts correctly and operates at a stable, safe current.
Usage
- The term "light ballast" is a compound noun. It is used specifically in the context of electrical lighting systems.
- It functions as a standard noun and can be modified by adjectives (e.g., light ballast, light ballast).
Examples
- The light ballast in the office fixture hummed loudly before it failed.
- To fix the flickering fluorescent tube, you may need to replace the light ballast.
- Modern light ballasts are more energy-efficient than the older magnetic versions.
Advanced Usage
- The term is often shortened to just "ballast" in technical and trade contexts when the type of lighting is already understood (e.g., "The ballast needs replacing.").
- It is a key component in High-Intensity Discharge (HID) lighting systems, such as those used in streetlights and stadiums, as well as in standard fluorescent lighting.
Variants and Related Words
- Ballast (n.): The more common, shortened form of "light ballast."
- Electrical ballast (n.): A more general technical term.
- Starter (n.): A related but distinct component used in some older fluorescent lamp circuits to initiate the electrical arc. A ballast may work with or incorporate a starter.
Synonyms
- Current limiter (n.): Describes one of its primary electrical functions.
- Control gear (n.): A broader term used in lighting engineering for components that regulate lamp operation.
Notes on Different Meanings
- Ballast (Maritime): In a completely different context, "ballast" refers to heavy material placed in a ship to improve its stability. The "light ballast" for lamps is an unrelated, specialized electrical term.
Noun
- an electrical device for starting and regulating fluorescent and discharge lamps