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About the Programme

Effective energy-efficient lighting design integrates efficient lamp technologies, optimum pole height and placement, efficient light distribution and aesthetics while using the least energy and meeting requirements for visibility and appropriate light levels ( NYSERDA, 2002)

The most common reason for inefficient street lighting system in municipalities & others are:

  • Selection of inefficient Luminaries
  • Poor design and installation
  • Poor power quality
  • Poor operation & maintenance practices

There is a tremendous potential to improve lighting quality while reducing energy use, costs, and GHG emissions-through energy-efficient retrofits for street lighting and improved operation and maintenance (O&M) practices.


Technologies Prevailing

Effective energy-efficient lighting design integrates efficient lamp technologies, optimum pole height and placement, efficient light distribution and aesthetics while using the least energy and meeting requirements for visibility and appropriate light levels ( NYSERDA, 2002)

Type of Lamp Luminous Efficacy (Lm/W) Colour rendering properties Lamp life in hours Remarks
Metal Halide (MH) 70-130 Lm/W Excellent 8,000-12,000 High luminous efficacy, poor Lamp Life
High Pressure Sodium vapour (HPSV) 50-150 Lm/W Fair 15,000-24,000 Energy inefficient, Poor colour rendering
Low Pressure Sodium vapour 100-190 Lm/W Very Poor 18,000-24,000 Energy efficient, very poor colour rendering index
Fluorescent Tube Light (T12&T8) 100-120 Lm/W Good 5,000-10,000 Poor lamp life, medium energy use, only available in low wattage
Energy efficient Fluorescent Tube (T5) 100-120 Lm/W Very Good 15,000-20,000 Energy efficient, long lamp life, only available in low wattage
Light Emitting Diode (LED) 70-160 Lm/W Good 40,000-90,000 High energy savings, low maintenance, long life, no mercury, high investment cost, nascent technology