The DLC grants allowances to its efficacy requirements to offset potential efficacy tradeoffs due to features that contribute to the overall quality of light produced by the listed product. These allowances are applicable to both tested and reported performance values. When allowances are used to qualify products to the QPL, those products are noted on the QPL Excel download as using the allowance. This resource provides examples of the testing required to qualify products using allowances and how those allowances may affect the product’s QPL listing. The specific requirements for allowances can be found in the Technical Requirements.