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EPAct Summary

EPAct Lighting Requirments for the EPAct Lighting Tax Deduction

According to the Interim Rules for EPAct Lighting Projects:

  • The lighting system energy savings target is a LPD (Lighting Power Density), or watts per square foot, that is 25% to 40% lower than the minimum requirements of ASHRAE Standard 90.1–2001
  • The potential amount of the EPAct tax deduction is $0.30 to $0.60 per square foot depending upon the percentage that the LPD is reduced beyond ASHRAE Standard 90.1 – 2001
  • For warehouses, the lighting power density (W/sq. ft.) must be 50% lower than the minimum requirements of ASHRAE Standard 90.1–2001 to be eligible for the $0.60 per square foot EPAct tax deduction.
  • Lighting power density (W/sq. ft.) reductions of <25% are ineligible for any EPAct tax deduction.

In addition to demonstrating a reduction in lighting power density lower than the requirements for ASHRAE Standard 90.1–2001:

  • Control provisions (i.e. Automatic Lighting Shutoff) relating to lighting systems as set forth in the Standard must be met.
  • EPAct Bi-level switching must be installed.
  • The lighting system must also meet the minimum requirements for calculated light levels as set forth in the 9th Edition of the IESNA Lighting Handbook.


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