I scored this a 6 during the challenge. Love the lighting and shadows. The perspective is cool too. The subject and backdrop are what are less interesting to me in this shot. Could just be my personal taste, but it didn't jump out and grab me. Still an interesting and creative study.
(before I forget, I want to say your "Sunset Slalom" is a spectacular image. truly good seeing! and a nice use of that 50-500mm lens)
Okay, on to the image at hand. I disagree with your commentors who seemed to require proof of the existence of candles. You say candles are present. So be it!
The only thing I can think of to critique in this image is the that subject matter is not really strong. The backlighting is a great idea and the red brick wall gives off a nice textural background. The leaves are (imo) not really strong enough to either carry a story, or to be a really pleasing image to, say, hang on a wall.
Then, you might consider a different cropping for this image, concentrating more on the light and cropping out a lot more of the dark areas at the bottom, right side, and yes, even the top. This would give a more intense glow to the candle-lit portions of your frame.
this lighting emphasizes the plant very well, color pleasant data by the red of bricks and the green spot of the plant. Beautiful composition, beautiful clearness.
Unfortunately, I had to rate this low. Although you say there are candles in it, it can also be an uplight. This is why I like to see the actual candle in the shot.