Very nice! The only thing I would have to comment on is that I don't think there's enough contrast. I see you're contrasting the blue with the orange light, but there's so little orange that it is essentially ineffectual. Adding a bit more colour contrast or more value contrast would, in my oppinion, greatly add to the piece.
Nothing more to add!!!
You have been featured in my weekly dA love for everyone! article.
Have a nice day