Page 1 of 1

Regular emitter vs. IES emitter

Posted: Sun Oct 24, 2021 1:37 pm
by Andreas Hopf
Why is a regular LED emitter with the same lumen output rendering brighter, even though the camera settings and all else are identical? The emitter material is assigned to a 10 mm2 plane, the same output area of the real LED.

I have the real LED here and the IES emitter's light distribution (74% of the light output is forward, max. output angle 120°) matches that of the real product, whereas the regular emitter's light distribution from the plane does (expectedly) not.