Diffusing/softening Lights in Cycles I'm coming from photography. So:
I made a champaign bottle in 2.78 with a fine shader, now I need those light's reflections in the glass to become nice and soft. 

I set up 2 "strip lights" (emitting planes) to bring out the shape, but the reflection is rather harsh and unpleasant. 

In photography, I'd place a strong diffusor right in front of the lights to avoid those razor sharp reflections. But how can I achieve that in Cycles? 

Of course, I would not alter the glass material. So either there is a way to modify the light source, light path or the light itself. 

Should I bounce the light off of a less reflective material onto the bottle? Like a reflector in photography.  Or should I place some kind of material in between lights and subject?

I've found a blur node, but I haven't used the compositor yet enough to know my way around. There is also supposed to be an "Integrator" according to the online documentation, but I have failed to find it in the software. 

Please help, dear Blenderers
Final



You can make your light source (Plane with Emission) 'diffused' as you want.

I've created this:



Then applied it as a Mix Factor between Emission and Transparent shader:



With this method you can create any light diffusion you want.