New certification program targets light pollution reduction

March 7, 2023
Challenging the industry to develop more dark sky-friendly lighting products, the DesignLights Consortium created a Light Usage for Night Applications Qualified Products List.

Challenging the industry to develop more dark sky-friendly lighting products, the DesignLights Consortium (DLC) created a Light Usage for Night Applications (LUNA) Qualified Products List (QPL). Building on DLC’s Solid-State Lighting V5.1 technical certification requirements, LUNA adds criteria focused on limiting light pollution and environmental harm.

Consequently, LUNA V1.0’s main goals are:

Minimizing lighting energy use. In addition to meeting the efficacy thresholds of DLC’s SSL V5.1 Technical Requirements, LUNA-qualified products must meet additional dimming, control and shielding requirements to ensure energy efficiencies in lighting.

Minimizing light pollution. The LUNA program introduces requirements for light distribution, correlated color temperature and dimming controls, as noted.

Providing appropriate human visibility. This includes SSL V5.1 spectral quality requirements, backlight-uplight-glare (BUG) reporting requirements, and additional spectral power distribution and intensity distribution reporting requirements.

The first to earn a place on LUNA’s QPL are 18 Cree Lighting XSPW version B wall mount luminaire 3000K models following performance testing by an accredited lab and rigorous review by DLC staff.

“We are very proud to have the LUNA program as a resource for the energy efficiency industry and we look forward to working with the lighting community to populate the LUNA QPL with products that are energy efficient, ensure appropriate nighttime visibility for people and work to mitigate the growing problems associated with light pollution,” stated DLC executive director and CEO Christina Halfpenny.

Following the release of the LUNA program, DLC anticipates industry product development in the following areas:

  • More decorative roadway/area luminaires with less uplight.
  • New luminaires with CCT of 2200K to 2700K at 105 lumens per watt or higher.
  • More public sharing of luminaire spectral data.
  • Added listings of shielded products.
  • Increased efforts to standardize outdoor chromaticity specifications for white & amber spectra.
  • A broader selection of DLC-qualified bollards.

For more information on the DLC LUNA program, qualified products, and how to apply, visit

First LUNA-Qualified Products

The first to join DesignLights Consortium (DLC) Light Usage for Night Applications (LUNA) Qualified Products List (QPL) are 18 wall mount luminaires from Cree Lighting’s XSPW series. Featuring rugged lightweight aluminum housings, the outdoor luminaires are IP66 rated and optimized for enhanced thermal management and optic design. Through-wired conduit entry from the top, bottom, side and rear supports easy installation.

This article appeared in the November 2022 issue of Architectural SSL magazine.

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About the Author

Architectural SSL staff

In January 2024, Architectural SSL evolved to LightSPEC. While the name changed, the editorial focus -- writing and developing audience-first content about architectural lighting in the built environment for architects, interior designers, lighting designers and manufacturers, and specifiers of commercial and residential lighting and controls -- remains the same.



Cree Lighting

March 7, 2023