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eHID

What is Electronic HID?

Electronic High Intensity Discharge (eHID) may be the most "green" of any Energy Efficient lighting technology on the market today as the customer is typically able to re-use existing fixture housings and reflectors.  In addition to reduced waste, the cost of upgrading a customer's lighting will often be less than that of Induction or LED, enabling paybacks within 12 months or less, depending on available Utility Rebates.

Benefits of Electronic HID:

  • Increase lamp life by 50%
  • High CRI Pulse Start Metal Halide Lamps (CRI > 92)
  • 25 to 40% Energy Savings
  • Superior Lumen Maintenance
  • Programmable Time of Day and Event Based Dimming
  • Easier Retrofits - re-use existing Fixtures

Magnetic ballasts for High Intensity Discharge (HID) lighting use a low frequency signal that produces lamp flicker and accelerates electrode decomposition. The discharged material blackens the interior of the lamp, rapidly and continuously reduces light output and shortens lamp life.  This phenomenon is called “lumen depreciation”. HID lamp manufacturers specify a measurement of lumen depreciation called “mean lumens”. Mean lumens, in the case of metal halide lamps, is defined as the light output measured at 40% of the lamp’s forecasted life. Forecasted mean lumens for most 400 watt metal halide lamps are about 70% of initial lumen output. Lumen output continues to decline thereafter.  To compensate for expected lumen depreciation of lamps driven by magnetic ballasts, experienced lighting designers over-specify lamp wattages.

Electronic HID (eHID) digital ballasts virtually eliminate lumen depreciation and are more efficient than magnetic ballasts.  You save money by installing eHID ballasts with lower wattage Pulse Start Metal Halide (PSMH) lamps that maintain desired light output levels for the life of the lamp. And since eHID ballasts reduce lamp electrode wear, you also extend the life of your lamps – by up to 50%.


Finally, since eHID ballasts are microprocessor based, you can use programmed dimming to dim your lamps at times when full lighting is not needed – saving still more energy and money.


EnvirOasis offers several eHID Ballasts will work with you to determine the best eHID retrofit solution for your application.