Common Characteristics of Lamps Used in Electrical Installations

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Below are the characteristics of the common lighting technology in use in different electrical installations. Also stated are their place of application, advantages and disadvantages:

Lighting Technology
Application
Advantages
Disadvantages
Standard Incandescent
  • Domestic use
  • Localized decorative lighting

  • Direct connection without intermediate Switchgear.
  • Reasonable purchase price.
  • Compact size
  • Instantaneous lighting
  • Good colour rendering

  • Low luminous efficiency and high electricity consumption.
  • Significant heat dissipation.
  • Short service life.
Halogen Incandescent
  • Spot lighting.
  • Intense lighting

  • Direct connection
  • Instantaneous efficiency
  • Excellent colour rendering

  • Average luminous efficiency
Fluorescent tube
  • Shops, offices, workshop.
  • Outdoors

  • High luminous efficiency.
  • Average colour rendering

  • Low light intensity of single unit.
  • Sensitive to extreme temperatures
Compact fluorescent lamp
  • Domestic use.
  • offices.
  • Replacement of incandescent lamps

  • Good luminous efficiency.
  • Good colour rendering
High initial investment compared to incandescent lamps
HP Mercury Vapor
  • Workshops, halls, hangars.
  • Factory floors

  • Good luminous efficiency.
  • Acceptable colour rendering.
  • Compact size
  • Long service life

  • Lighting and relighting time of a few minutes
High-Pressure Sodium
  • Outdoors
  • Large halls

  • Very good luminous efficiency

  • Lighting and relighting time of a few minutes
Low-Pressure Sodium
  • Outdoors
  • Emergency lighting

  • Good visibility in foggy weather
  • Economical to use

  • Long lighting time (5 mins).
  • Mediocre colour rendering.
Metal halide
  • Large areas
  • Halls with high ceilings

  • Good luminous efficiency.
  • Good colour rendering.
  • Long service life.

  • Lighting and relighting of a few minutes
LED
  • Signaling (3-colour traffic lights, exit signs and emergency lighting

  • Insensitive to the number of switching operation.
  • Low energy consumption.
  • Low temperature

  • Limited number of colors.
  • Low brightness of single unit