Light Diffuse Multiplier Not Working

[pBarrelas]

I was trying to control a light intensity through the V-Ray Light options but the Diffuse Multiplier doesn't do anything. I was only able to control it through the Area Light Modo default options. Is this the right method?

[vladimir.nedev]

The "light diffuse" multiplier in the V-Ray light settings is for the photon map GI specifically (it is under Photon Emission).
If you want to control the light intensity in a physically correct way, you should use the standard "Radiance" channel in the modo lights.
If you want to have the light affect diffuse and specular surfaces differently, the modo light material has the "affect diffuse" and "affect specular" channels which V-Ray will respect.

Greetings,
Vladimir Nedev

[pBarrelas]

Vladimir, many thanks for the clarification!