Inside lighting with Geo Light

[ISUther]

Hello,

I have a question.
Lets say for this example sake i have a object A and it has some kind of effect.
Now i want to make object a glow from inside.
What i do is make a copy from that object >> Scale object down and now object A has inside of it smaller copy of it with that effect.
Lets call that smaller copy object B
Now i select object B that is inside of object A and click on "Geometry Light" this turns off object B display and creates same shape geometry light inside.
I choose geometry light color. And in this example color RED

But problem i have is that my object A has holes in it that i want it to have and through the holes i know see that direct light red.
How to make it this way that when object A is not covering object B i do not see object B?