/3/ - 3DCG

>>703704
If you're using Cycles, just use the "is camera ray" from the light path node (input>light path) in your material as a mix factor.
So basically you can control what the camera "sees" and what actually interacts in your scene.

So for example, a blue metallic ball emitting pink light. You can do all sorts of stuff with it.

In your case, I'd just make the camera see the lights you want, and mix it with a black emission, so it's not actually emitting anything.