Do You Know the Difference Between Raw Lumens vs. Effective Lumens?
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LED lamp output values (Lumens) can vary dramatically depending on which values are being quoted. The following information may assist in selecting the right product for the right application. Raw Lumens This is a measure of the theoretical output of a light. Raw Lumen output is calculated by multiplying by the theoretical rated output of the LEDs by the number of LEDs in the lamp. Example: 8 LEDs rated at 100 Lumens per watt 8 x 100 = 800 Raw Lumens Effective Lumens This is a measure of the actual output of a light. The Effective Lumen output takes into consideration electrical and real world losses (ex. thermal, optical, and assembly), so it is a better representation of the useful visible light that is actually produced. Example: Raw Lumens = 800 Thermal, Optical & Assembly Losses = 40% (of Raw Lumens) 800 – 320 = 480 Effective Lumens What do you mean by Thermal Losses, Optical Losses and Assembly Losses? There are inherent losses associated with any lamp