Luminaires & Distribution
Last Update: November 1, 2011
Adjust text size: Decrease text size.Restore text size.Increase text size.

Interior Retrofits

Significant improvements in lighting system performance can result from interior lighting retrofits. Advanced lighting retrofits reduce energy use and improve system efficacy, light distribution, color rendering properties and maintenance factors. The goal in retrofits is to lower operating costs. This is achieved by replacing existing components to utilize more-efficient technologies, reducing operating hours, and/or counteracting maintenance aging or neglect.

When deciding to retrofit luminaires, consider the importance of design criteria such as flicker, direct glare, light distribution on room surfaces, color appearance, and other criteria. These criteria are described in the Design Considerations section of these Guidelines and in chapter 10 of the IESNA Lighting Handbook, Ninth Edition. A successful retrofit involves addressing or managing user expectations.

Refer to EPRI's Lighting Retrofit Manual for specific recommendations for commercial and industrial applications. Technology recommendations discussed in the Lighting Retrofit Manual for the majority of common luminaires include:

  • Ballast conversions
  • Lamp conversions
  • Reflector replacements
  • Shielding and diffusing media replacements

Another resource when considering retrofits is LEM-3-07, IESNA Guidelines for Upgrading Lighting Systems in Commercial and Institutional Spaces.

Linear Fluorescent Retrofits
To achieve the greatest energy reduction, full troffer retrofits are typically comprised of a combination of increasing the efficiency of the optical system and relamping and/or delamping the luminaire.
More »

Compact Fluorescent (CFL) Screw-in Retrofits
Most CFL screw-in retrofits are manufactured and sold as self-ballasted lamps and intended to replace incandescent lamps in common, usually residential, applications.
More »

Ceramic Metal Halide (CMH) Screw-in Retrofits
Similar to the compact fluorescent screw-in retrofits, self-ballasted medium screw base low-wattage Ceramic Metal Halide (CMH) PAR lamps are available to replace halogen PAR lamps and incandescent reflector lamps. Used primarily in track heads for retail applications...
More »

LED Retrofits
Due to the high efficiency of the LED source, it is suitable for some retrofit applications in interior spaces in existing buildings.
More »

Skylights – Toplight Retrofit
Adding skylights to an existing building is often possible. Excellent examples include open structures such as warehouses, vehicle repair and storage garages, “big box” retail, loft buildings and manufacturing plants.
More »