at the prom

I photographed these calla lilies at a prom last Saturday night. The event was held at the Waxahatchie Civic Center and in the main foyer was this huge arrangement of calla lilies front and center. I had crouched down beside the arrangement to get a low angle shot of the kids walking down the hallway when I look up to see these flowers just begging to be photographed. The light and tone of the shot was quite unexpected, and I'm not so sure about the white orb in the background. Without knowing the back story of the photo, does that look like a moon-or a light? But the flowers are beautiful-and I don't even know if they are real.