This has the potential as great subject matter. Unfortunately, this composition is hurt by the light switch (we really don't want to see something as mundane as a modern light switch in a dramatic compostion such as this) and the dark areas to either side of the frame. Try this again but instead, don't try to get the whole piano in the shot. Move in closer to the lovely scroll work of the music stand and the old fashioned name plate over the keyboards. Just rotating your camera and making this a vertical shot would have eliminated all the distractions I mentioned.
I'm torn. I really enjoy the lens flares from the candles here, but the excessive noise in the shot (low-light hell, but it's the price we pay), the light switch, and the pile of cardboard boxes in the background all tear away from a great concept.
I hate to be picky, but the lightswitch in the background is very distracting. Also distracting is a kind of disequilibrium feeling from the photo not being centered (I know a lot of people frown on centered subjects, but for the symmetry in this shot to work, it probably needs it). The shadows on the wall detract a bit as well. I do like the piano and candles together as a subject, and I am not interpreting the challenge instructions SO literally that multiple light sources can't include those being in the picture (as opposed to being applied to the subject photographed). I think it is a good attempt...you obviously worked hard on your setup and were working for a particular look or mood.