Hi John,
If I'm correct, didn't I see another from this series?
Was that yours also?
In respect of this shot, you have a lot of distractions going on in the background.
I can see you've tried to separate the subject from the background by use of a narrow Depth of Field, but due to harsh light, and an inability to place the subjects against a more photogenic background, I think you've got an almost impossible task.
I say "almost" because the options are:
extensive burning and/or cloning in PP, plus perhaps a tighter crop
shooting them at night and illuminating just the subject orbs with flash/strobe lights or light painting with torches/flashlights (hoping such access is even possible)
or something I've not thought of
HTH, Dave