Horticultural Lighting Resources

Horticultural Lighting Resources

The resources below are supplemental guides for particular areas of interest in horticultural lighting. These guides introduce and summarize the topic, explain how it relates to DLC policy, and point the way to additional resources for further reading.

Please note that several of these resources address topics that do not appear in the current Horticultural Lighting Technical Requirements, but that the DLC may consider in the future. For more detail on the DLC’s horticultural lighting revision and update cycle, please visit the Horticultural Lighting QPL Revision Cycle page.

If you would like to contribute to future revisions of the DLC Horticultural Lighting Technical Requirements through the DLC's stakeholder input process, please sign up for our mailing list here.
  • Terms and Definitions

    Terms and Definitions

    This guide explains the common units of measure one might encounter in the general illumination world, and emphasizes that plant-specific units should be used when working on horticultural applications.

  • Ultraviolet Light

    Ultraviolet Light

    This guide explains the challenges with attenuated reflection in currently-used whole-fixture measurement methods for horticultural lighting.

  • Application Design

    Application Design

    The application design guide walks the reader through the interrelated considerations of energy flowing through a growing facility.

  • Active Cooling

    Active Cooling

    The active cooling guide explains the background of current test procedures, and how questions need to be answered to test actively cooled fixtures in the same way.

  • Additional Tools

    Additional Tools

    Resource Innovation Institute Cannabis PowerScore

    Rensselaer Polytechnic Institute (LRC) Horticulture Luminaire Calculator

    If you know of additional tools you'd like to see added to our site, please contact us.