Comparison of Common 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