While the primary intent of the DLC SSL QPL is to serve the energy-savings goals for the DLC Member programs, it is not the intent of the DLC or its membership to drive market development or customer choice away from features that contribute to the overall quality of the light fixture or the quality of the lighting for a particular space. DLC and its membership are therefore sensitive to concerns that high efficacy thresholds may drive features in a way that are not intended. DLC will grant allowances to efficacy requirements, applicable to both tested and reported performance values.
Adopted Allowances: CCT, CRI
Products with low CCT or high CRI can qualify for listing on the QPL at slightly reduced efficacy levels, as noted in the table below.
|Feature or Performance Metric||Allowances to Efficacy|
|CCT: ≤3000K, >2700K||-3%|
CRI*: Ra≥ 90
Please note that allowances are not cumulative. That is, products may not take multiple allowances, even if they exhibit more than one feature for which an allowance is available. For example, a 2700K, 90CRI product may utilize a maximum allowance of 5%, to be applied to the efficacy requirement for the Category and General Application to which it is applying. However, a product may take advantage of an efficacy allowance in conjunction with the luminaire efficacy tolerance, as stated in Table 5. In this situation, the allowance would be applied first, and then the tolerance.
More information on how tolerances are applied to the requirements can be found in the Solid State Lighting FAQ section of the webpage.