We use average spectroradiometric data for each LED type to estimate fixture performance and perform these tests in a laboratory environment. In practice your actual photometric results may vary. In addition, LED output will vary slightly both in spectral content and radiometric flux within the LED manufacturer’s bin tolerance. In normal use these variances are insignificant. If you are using a fixture in a research environment please contact us and we can provide performance details for the specific fixture if need be. The performance details we publish are taken from actual production fixtures and therefore include optical, thermal and electrical losses. They therefore meet the guidelines established in the official IES test protocol for measuring light output of solid-state lighting products. Some companies only list the performance specifications of the LED, which is not an accurate method of assessing the radiometric performance of a finished lighting system.
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