Family Groupings

In 2013, LED Lighting Facts began allowing family product groupings so that performance values for related products could be extrapolated or calculated from a fully tested single product in the family: the “parent” product.


Manufacturers must earn the privilege to group products in a family through established experience and history, as demonstrated by one of the following criteria:

1)   LED Lighting Facts

•   LED Lighting Facts Partner for at least one (1) year and

•   At least ten (10) active products (products listed and/or updated in the past year)


2)   DesignLights Consortium®

•     Manufacturers who are approved to submit family groups through the DesignLights Consortium (DLC) automatically qualify for the LED Lighting Facts family grouping privilege. Please contact with your DLC family application number if you believe you meet this requirement.

Manufacturers who do not meet the family grouping requirements may submit only fully tested single products to LED Lighting Facts until one of the above requirements is met. Access to the new submission process is granted once the criteria is met. The Manage Your Products page indicates the status and product count for each manufacturer.

Defining Product Families

Each product family must include one parent product, designated by the manufacturer to represent the entire family of products, and at least one additional related product. Single products must be submitted through the single product submission form.

Requirements for a parent product are as follows:

  • Must have an LM-79 test report
  • Must relate to the family in the manner defined by the manufacturer
  • Must adhere to tolerances for each initial submission of a tested product, regardless of family grouping status. For more information on the tolerances and the required documentation for optional metrics, please see the Product Submission and Testing Requirements policies.  

Please note that the parent product does not need to be the highest or lowest performing product.  Manufacturers also have the option of submitting a test report for additional products that are a part of a family. Those new to the LED Lighting Facts program or without an established relationship are required to submit a test report for every submitted product.

Family Description

A description of each product family must be provided, which will be publicly listed on the LED Lighting Facts Products List along with the family member products.

At a minimum, the descriptions must include the following information:

1.  Characteristics shared by products in the family (e.g., model name, intended application, LED module)

2.  Characteristics that vary among products in the family (e.g., lumen output, CCT)


Products listed with a family group must be related and have their own performance features that are unique to that product. For products with multiple variations that do not materially affect performance (e.g., trims or housing finishes), “wildcard“ values in a product SKU or model number may be applied such that a single listing would represent more than one SKU or model, so the family grouping would not be required.  Please see the Product Submission and Testing Requirements policies for more information on allowable variations. The approach is designed to be flexible enough to accommodate any qualification program that uses LED Lighting Facts for verification of product families – including DLC. Because LED Lighting Facts is not a qualification program and does not maintain minimum performance criteria, the program is indifferent to the performance levels that are submitted, as long as they are represented accurately. Some examples of common family grouping elements are presented below to assist partners during the submission process; they are not required by the program.

Lumens as a function of:

  • LED package configuration
  • CCT/CRI combination
  • Optical/shielding media efficiencies
  • LED drive current
  • Heatsink variation
  • Ambient

Wattage as a function of:

  • Driver(s) efficiencies
  • Voltage operation
  • LED forward voltage
  • Drive current
  • Heatsink variation
  • Ambient

Efficacy as a function of:

  • Lumens (as noted above)
  • Wattage (as noted above)

CRI as a function of:

  • LED package
  • Drive current
  • Optics /shielding media

CCT as a function of:

  • LED package
  • Drive current
  • Optics/shielding media

Power factor as a function of:

  • Driver(s)
  • Load on driver
  • Voltage
  • Input voltage – as stated in the configuration


  • LED package
  • Drive current
  • Optics/shielding media

Zonal Lumens

  • Optics/shielding media
  • LED configuration


  • Driver(s)
  • Load on driver
  • Voltage

LED Lumen Maintenance

  • LED package
  • LM-80 report
  • Drive current
  • LED die configuration
  • LED forward voltage
  • Heatsink variation
  • Ambient

If applicable, manufacturers are encouraged to provide a specification sheet for the lamp or luminaire to support the family group description. A specification sheet should include:

  • The manufacturer (OEM or private labeler) organization name and brand.
  • Model number matching the test report and LED Lighting Facts submission.
    • Ordering code for a product family is acceptable if the model number in the test report and LED Lighting Facts submission is included.
  • Image or drawing of the product.
  • Nominal rated (or tested) initial wattage.
  • Nominal rated (or tested) initial light output.
  • Driver characteristics or compatible drivers.
  • Contact information for the organization listed on the specification sheet.
  • Indication of warranty (if applicable).
  • Indication that variable drive current controls are used to maintain light output and/or color over time (if applicable).
    • Maximum possible increase above nominal initial wattage over the service life of the product (expressed in watts) should then be included.


Scaling Methodology

Documentation is required to show the methodology used to determine performance values of related products from the tested parent product.  The manufacturer may choose whether this documentation remains private or is made public. LED Lighting Facts will review the methodology and verify the test report for the parent product. If the methodology is not documented fully, or its relation to the family grouping description is not clear, LED Lighting Facts reserves the right to request more information to support the proposed methodology. 


Submitting Optional Metrics for Families

Manufacturers can enter optional metrics for parent and related products. Documentation is not required for the methodology used to determine optional metrics for related products, except for lumen maintenance (see below). 

A manufacturer may choose to claim optional metrics only for the parent product, without having to list optional metrics for related products in the family.  The submission must include the required documentation listed in the submission requirements for a single product submission and the documentation provided must be for the parent product. For more information on required documentation for optional metrics, please see Product Submission and Testing Requirements.

Lumen Maintenance

If lumen maintenance is entered for all products within a family, the values can be scaled, provided that a methodology supporting the scaling method is submitted.  A tested lumen maintenance (LM) product in the family must be designated, from which the calculations will be based.  The tested LM product may be different from the tested parent product, however it must still be included in the family group upon submission.

Required documentation for the tested LM product must be submitted, including:

  • LM-80 test report on LED package/module/array from a laboratory listed on the LED Lighting Facts Approved Labs list
  • LED package/module/array specification sheet
  • ISTMT on tested LM product from a laboratory listed on the LED Lighting Facts Approved Labs list
  • Completed copy of the ENERGY STAR TM-21 Calculator
  • Documentation of the methodology used to determine LM values for related family products.


Different LED chips/modules/arrays within a family

In the case where a family contains products with different LED chips/modules/arrays, a tested LM product must be designated for EACH unique LM-80 dataset used in the family. These groupings are treated and evaluated as subsets of the family.  Required documentation must be submitted for EACH tested LM product, including documentation of the methodology used to determine the lumen maintenance values listed for the related products within the subset:

  • LM-80 test report on LED package/module/array from a laboratory listed on the LED Lighting Facts Approved Labs list
  • LED package/module/array specification sheet
  • ISTMT on tested LM products from a laboratory listed on the LED Lighting Facts Approved Labs list
  • Completed copy of the ENERGY STAR TM-21 Calculator
  • Documentation for methodology used to determine lumen maintenance values for the subset of related products using the same LM-80 dataset.

Worst-Case Lumen Maintenance

If the tested LM product represents a worst-case lumen maintenance condition for the product family or subset of related product family members in the case of multiple LED chips, the manufacturer may choose to list the same worst case LM% for all related products in the family or subset (without scaling). Typically, the worst-case lumen maintenance condition is the product with the hottest thermal environment for the LED. The manufacturer must provide justification for the selection of the model that represents the worst-case lumen maintenance condition.

Alternatively, if justification can be provided showing that there is no change in thermal conditions in the products of the family group, thus proving that no worst-case product exists, the manufacturer may list the same lumen maintenance percentage for all related products in the family.

For more information on how to submit products as a family, please see the Manufacturer Product Submission Guide.