The light blobs appear to be placed a bit off (to the left). Have you tried a smooth gradient for the light blobs already? I think it could fit nicely.
Btw. during the last semester break I worked on 2d stuff too but didn't manage to finish this concept scene:
Uni is killin' my time since then.
This is an older shot (before I've doupled the resolution) which occured after a failed shader compilation: