Good idea, but, perhaps, because of the nature of the glass, it appears out of focus. Right, why should you be blamed for the glass, but you picked your subject, and have complete control in a studio setting.
I am not fond of this image composition. Perhaps a more head on approach would be better. Here, you lose the line and texture of the wall as well as the interesting shape of the socket. I think the candle just doesn't fit either. You did shoot light on white though, so you met the challenge. Just not a very mocving arrangement. 5