Surface Brightness?

[paride4331]

Hi samsue,
683 lm/W is maximum possible Efficiency value (631 was my mistake..)
https://en.wikipedia.org/wiki/Luminous_efficacy
https://www.rapidtables.com/calc/light/ ... lator.html
Using Octane light you would use [lumen*(1\683)] value in power, but I would use as you did the emission node.
viewtopic.php?f=30&t=42275&p=313725&hilit=lumen#p313725

Enabling surface brightness, power specifies the brightness of the surface and not the total emitted power. The brightness of the emitter is independent of the area of the surface.
Regards
Paride