Prevent point lamp from shining through mesh lamp in reflection I have a scene which must appear as if it's lit by a very small mesh lamp.  To optimize performance, what I'm trying to do is place a point lamp inside of the mesh lamp, and have the point lamp shine through the mesh lamp by having the mesh lamp's back faces be transparent.  However, in the reflection of the lamp on a glossy material, the point lamp shines through the mesh lamp:



I've tried making the point lamp invisible to glossy surfaces via Ray Visibility, and having the mesh lamp only be visible to glossy surfaces and the camera.  While this works, it makes rough glossy surfaces quite noisy, partially defeating the purpose of using a point lamp instead of a mesh lamp in the first place:



Are there any other solutions?

.blend file
Two possibilities: 


Remove the glossy ray visibility of the lamp :





Or you can set up the sphere nodes like this :





OK, this is what you said in your question... but it works...