Help, VFX, CGI

Hi, I have a question. How can I add CG light to real objects without REAL LED LIGHT in a studio? Is there any “Light Catcher” like Shadow Catcher? And I have the same question but for reflection like “Default Cube” reflected on a real car or window.

You’ll have to matchmove and model everything that is going to be lit, render with a black background them merge in your plate using a compositor add/plus operation. Same procedure for reflections but with a screen operation.