Lighting

 

Maintenance

Proper maintenance is vital to efficient lighting. The amount of light produced decreases over time because of aging lamps and dirt on fixtures, lamps, and room surfaces. This can reduce total illumination by 50% or more, while lights continue drawing full power.

  Energy efficient fluorescent T5/T8 lamps will only depreciate about 6% over their life. HID lamps will depreciate 50% at half of their life expectancy.
  T5/T8 lamp life is now improving beyond 39,000 hours of operation.
  HID lamps have a life expectancy of approximately 20,000 hours.
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