I didn't vote on this challenge but would have given this a 9. lovely lighting and meets the challenge perfectly. For me it wouldn't work without the smoke and the shadows. Not sure if colour would have worked as well!
I love the photo. I don't care for the smoke, however. I think it distracts from the simplistic beauty of the photo. 8 with the smoke. Would have been 9 without it -- very well done!
A different take & I love the low key lighting (you should submit a similar one for low key) I think a tighter crop would have been even more effective. 7