Lumen
Raw Lumens
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
Effective Lumen output is a measured number that takes into account real
world losses (ex. thermal, optical, and assembly).
Example:
Raw Lumens of 800 and Thermal, Optical & Assembly Losses of 40% (320)
800 - 320 = 480 Effective Lumens