Hi Creative Raul.
This was awkward (... something in the app is not OK!). The Ambient Occlusion option in the Render-Setting disabled this. Switch this off and it works.
(As I don’t use AO - I never encountered it. AO is an artificial and geometry based only simulation. Nothing that has anything to do with real light. I think that GI doubles the information were it is correct, so… However, many people love it, so ignore my comment ;o))
However, it should not disable that Luminance information is invisible. This needs to be cleared by the Support, which would be nice if you could send your scene files from above as it is to them, Thanks!
http://www.maxon.net/support/support-questions.html
What I do not understand is the use of the AO shader in the Luminance channel for the Lightbulb coil. Perhaps I miss something.
What I do changed was the Light bulb glass body. The one I found in the scene was more a full glass body. I copied the object twice, changed the Normal on one, then made a normal move to make it smaller. Both selected, I used the “Connect and Delete”—which comes closer to the “normal” bulb, if that was the target at all.
I placed a Buffer to the coil to have a Glow effect on it. I saw that in your Render Preference. But the Object Glow works not for objects behind others, e.g., glass.
Note that I reduced the resolution of the coil by setting the interpolation setting differently.
The image is based on Global Illumination. Note that I have switched a lot of objects off. Your results might vary. It is low quality/preview!
All the best
Sassi
https://www.dropbox.com/s/h51w3l0eyegqne9/CV2_r16_drs_14_REbu_01.c4d.zip?dl=0