Hello,
I recently upgraded from Rhino 7 to Rhino 8. I just tried the Emission demo file to try the new Cycles speed, and noticed a huge difference between the required Emission intensity to get the same result.
In Rhino 7, moving to 50 makes the material very bright, and illuminate the cube. In Rhino 8, 50 is barely dim, and 10,000 was needed for a similar level of emission.
Is there a setting that is causing this? I have attached screenshots to show the issue.