How to add inner glow to 3D mesh object?

I’m trying to create cubes exactly like the cubes pictured here in leap motion’s VR playground:

From what I found, to achieve an inner glow it was suggested to add a point light inside the mesh and make the mesh transparent. However, I can’t seem to illuminate the mesh at all using this approach:

How do I achieve this effect without using bloom?

You can of course tweak the material to make it brighter, for instance by setting emissive which controls the color of the lows but the light emitting from these blocks in that screenshot is selective bloom.


Maybe selective bloom is an option?

Ah I did not know they were using selective bloom as well, I thought that maybe this effect could be achieved in a different way