How to create "Holy Grail" type outer glow?

What I mean by "Holy Grail" is that intense outer glow of crosses in religious illustrations but that looks natural in photographs. I am looking for technique, filter or third party plug in.

I have product photos to create this type of outer glow but I also want it to look natural.
I am looking for a fast, easy and adjustable way to do this -- if at all possible.

Any and all suggestions are welcome.

Thank you.

Did you try to play with the settings of the outer glow in the layer styles? I'm sure you could get a similar effect of what you want... If not do you have any picture as reference of what you want to do?