Hello,
Light intensity changes when I change the geometry mode.
Here I have set up a test scene where there is only one rectangular Octane light.
Light Power : 1.0
Geometry type : Global
Here same scene only this time I have changed light type to movable proxy
Light Power : 1.0
Geometry type :Movable Proxy
I have ramped the light power to 10000, The light intensity exactly matches the first sample with Global geometry type
Light Power: 10000.0
Geometry type : Movable Proxy