Definition

Noun: A mercury-vapor lamp is an electric lamp that produces light when an electric current passes through ionized mercury vapor. It emits a characteristic bright, bluish-white light that is rich in ultraviolet radiation.

Usage

The term is used to describe a specific type of high-intensity discharge (HID) lamp. It is often employed in contexts discussing lighting technology, industrial applications, or specialized equipment. - It functions as a compound noun. The hyphenation ("mercury-vapor") is standard. - It is typically used in its singular or plural form as a countable noun (e.g., a mercury-vapor lamp, several mercury-vapor lamps).

Examples

• Noun:
  • The street was illuminated by the harsh glow of a mercury-vapor lamp.
  • For growing certain plants indoors, a mercury-vapor lamp can provide the necessary spectrum of light.
  • The factory replaced all its old lighting with more efficient mercury-vapor lamps.

Advanced Usage

• Technical Context: In physics and engineering, the lamp's operation is described by the excitation of mercury atoms.
  • The efficiency of a mercury-vapor lamp depends on the vapor pressure and the electrical ballast used.

Variants and Related Words

• Mercury lamp: A common shortened, though less precise, variant.
• Mercury-vapor light: A synonymous phrase.
• HID lamp (High-Intensity Discharge lamp): The broader category to which mercury-vapor lamps belong.
• Ultraviolet lamp: A functional description, as mercury-vapor lamps are a type of UV source.

Synonyms

• Mercury discharge lamp
• Hg-vapor lamp (using the chemical symbol for mercury)

Related Phrases/Compounds

• Mercury-vapor lamp ballast: The required device to regulate current to the lamp.
• Mercury-vapor lamp fixture: The housing or assembly for the lamp.

Noun

1. ultraviolet lamp that emits a strong bluish light (rich in ultraviolet radiation) as electric current passes through mercury vapor