DLC Premium Requirements

DLC Premium Requirements

DLC Premium is a higher-performance classification for luminaires and retrofit kits. Products submitted to the DLC Premium classification must meet higher efficacy and lumen maintenance requirements outlined in the Technical Requirements Table and must also provide a driver ISTMT and information about integral controls, in addition to meeting all of the base requirements. If a manufacturer seeks qualification of its products to the DLC Premium classification, it must provide all the necessary testing to demonstrate the products meet the higher classification’s additional requirements.

Eligibility for DLC Premium Classification

Only luminaires and retrofit kits are eligible for qualification under DLC Premium. 

Replacement lamps and luminaire products with a Primary Use designated as “Specialty” are not eligible to qualify for the DLC Premium classification at this time. Manufacturers must select a Primary Use designation other than “Specialty” to apply under the DLC Premium classification.

DLC Premium Requirements

L90 of ≥ 36,000 hours

In addition to an L70 requirement of ≥50,000 hours, products submitted to the DLC Premium classification will need to meet an L90 of ≥36,000 hours. This will be evaluated through TM-21 projections in the same manner as the L70 requirements.

Integral Controls Reporting

Manufacturers submitting products to the DLC Premium classification will need to indicate if the product can be ordered with integral controls (occupancy sensors or photo sensors). The DLC will evaluate a manufacturer’s claims of integral controls capability by ensuring that these features are clearly identified on the product specification sheet. DLC reviewers may check web listings and other marketing materials, and reserve the right to request additional information to demonstrate integral controls capability if product specification sheets are insufficient.

Driver ISTMT

As part of the DLC Premium application process, manufacturers need to provide the following driver ISTMT information:

  • Test report from a lab that meets DLC’s Laboratory Requirements for In-Situ Temperature Measurement Testing (ISTMT). The report must include the measured temperature from the TMPps.
  • A picture of the TMPps location with an arrow indicating the thermocouple attachment point.
  • Documentation from the driver manufacturer that indicates the maximum case temperature for which the driver is designed to last ≥50,000 hours, as well as the TMP location it designates for thermal testing.
  • Custom and integrated drivers must provide equivalent documentation as drivers from third-party vendors. Manufacturers must supply documentation indicating the maximum acceptable temperature for the driver for 50,000 hour life, as well as the TMP to be used during thermal testing and evaluation.

The luminaire passes the driver ISTMT requirements if the measured temperature at the TMPps is less than or equal to the allowable operating temperature specified by the power supply manufacturer. Drivers shall be tested in-situ under steady-state operating conditions, with case temperature measured at the designated TMP.

One or more additional thermocouples are attached to the power supply/driver at the TMPps. For off-the-shelf remote power supplies, manufacturers typically provide a measurement location (case temperature designated by a “dot” adjacent to a (tc) symbol) for warranty purposes. In situations where the TMPps is not designated by the manufacturer, or where power supplies are integrated with the LED package(s), array, or module(s), fixture manufacturers should identify the TMPps to be used for warranty purposes. Note that this includes situations where the driver/power supply is not purchased from an outside vendor, and where the driver/power supply is integrated into the luminaire or lamp.

The thermocouple tolerance shall conform to ASTM E230 Table 1 “Special Limits” (≤1.1°C or 0.4%, whichever is greater).

If an application contains more than one driver (of the same series) in a family then a driver ISTMT will need to be provided for each driver submitted or the manufacturer will need to provide detailed evidence to demonstrate which driver would be worse case. The documentation provided will be reviewed by DLC staff.

How to Submit to DLC Premium

Products submitted to the DLC Premium classification may be submitted in either a Single Product Application or in a Family Grouping Application. Single Product Applications may not contain products submitted to multiple classifications, multiple light output bins (for outdoor luminaires), or multiple primary uses.

If a manufacturer submits a family and only part of the family meets the DLC Premium classification requirements, the manufacturer will need to provide additional worst-case testing sufficient to demonstrate compliance of each part of the family group with the applicable requirements.

Updating Qualified Products to DLC Premium

In order to update products on the QPL to the DLC Premium classification, manufacturers must create a new product application through the application portal. Manufacturers must submit the additional required information on driver ISTMT, safety certification, controls information, and L90 evaluation, along with a new application form and any other additional information not provided with the original application. Learn more about updating listed products to Premium Classification here.

Please review the FAQs page for additional policy clarifications.