How to have emission plane light the scene including glossy objects but not show up in glass reflection? Using Cycles.  I have lit and rendered 20 different objects with the same lighting set up.
Now using same setup to render a glass object, as part of the series.
However the emmissive plane used for lighting is now showing up in the glass reflection of this particular shot.

I don't want to change the lighting now.  Needs to be uniform across the previous 20 renders.

Tried turning off that light object's Glossy ray visibility, but that made the glossy objects around the glass too dark.

Is there another way to keep the scene just as well lit, but remove the plane's reflection from the glass?

I've got the impression from this post that 'render layers' might have to be involved, but I'm quite new to blender, a bit short on time, and hoping for simpler method, if anyone knows.







Trying Leon Cheung's method:
For the emission plane material, you can make use of Sigular Ray to get rid of perfect reflection and transmission.

Comparision: