Hi,
I find it a problem about the intensity of the lights. usually in vray it imposed a value in lumens, and that value remains fixed regardless of the size of the light, and rightly so. In corona it is not so, if you keep a multiplier 50 in a 5x5 cm light, that value distinctly different in a 100x100 cm light.
This is critical to have a proper scale and proportion of the light intensity and it is important to have a realistic result of the scene
In Corona, you must to use Lumen too, and not the default units.
Oh, sorry, didn’t see it was Cinema 
You cannot do nothing. You must to wait for lumen parameter =)
I hope that the team Corona add this parameter in cinema 4d
You can create an object and add it a Corona light shader, where you can adjust the intensity of a light. It’s pretty like using mesh light in Arnold.
Hi, the intensity parameter specifies differential radiance per meter and steradian, so of course it scales with a larger light. Right now, Corona for C4D allows you to set the light intensity in photometric units like candela, lumen or lux and these should behave correcty with scaling.
