The concept if this peice is amazing and i really respect it alot. if i had to give any sort of creative suggestion, I think instead of brown you should give more of a stary night sky, to empasize the light of the light bulb. also it would be kind of unique if within the light bulb you made a faint light figure. almost like it is depicting the person's soul. or within thelight bulb mke multple expressions of different emotion, or some ideas. That's all i have to say, as it stands i like it, and i appreciate your work!
I recently had a project to draw an object a hundred different ways. Mine was a lightbulb, so this resonates very clearly with me. I was going to say that this should be a T-shirt, but I see that you think the same, looking at the groups. I'd wear something like this though - it's pretty awesome, and I love the limited colour palette.