Beautiful bloom! And it doesn't look like a huge plant either (I've seen a lot of digbyanas that get kind of leggy, with elongated pseudobulbs and leaves). Very nice blooms and plant.
Steve
Could this be caused by a lack of light or to much nitrogen?
Your question is well received. My plant grows very "tight". I have seen many cultivars of this species throughout the years. Some seem very "leggy"; some seem to be "tight", like mine. There is no way to determine without a "controlled" experiment. I don't have the resources.