HID to LED

  • LED Offers Long Life, and Lower Energy Costs LEDs offer substantial energy savings compared to high intensity discharge (HID) and other traditional lighting systems
  • HID lamp:  Source efficiency is typically 120 lumens/watt or higher.  However, losses from trapped light, protective covers and lenses, inefficient ballasts and unfavorable operating temperature typically result in a measured system efficiency of 30 lumens/watt or less.
  • LEDs:  Source efficiency can be 100 lumens/watt or higher, depending on the type and manufacturer of the LED used.
  • There are no losses from trapped light due to the focused output of the LED, and secondary optics and protective covers generally reduce output by only 25% or less.
  • LED power drivers are also more generally efficient than HID ballasts, and reduce system efficiency by 10-15%.  However, even when efficiency reductions due to high operating temperatures are included, LED system efficiency often remains above 50 lumens/watt or higher.
  • The 35,000 to 50,000-hour bulb life of LED compare to 1000 hour incandescent or 2000-hour halogen.
  • Implementing an LED replacement program should result in a 50% reduction in annual energy use (kWh) costs.
  • The quality of the illumination — better color rendering — can be achieved with LED’s
  • Lighting equates to 12% of global grid based electricity consumption 50% – 70% expected energy saving with LED lighting
  • Municipality lighting from street lights and park lighting accounts for 40% of the electricity bill of local municipality.
  • LED lamps can reduce up to 50% of CO2 emission 50,000 Hours of the expected life of an LED, will reduce the cost of maintenance.