Why does Genji want Tamakazura to be seen in the light of fireflies? Explain.

Even though Genji has developed feelings for Tamakazura, he still wishes to marry her to someone worthwhile. He arranges a meeting between her and Prince Hotaru. Genji wants Prince Hotaru to see Tamazura in the light of the fireflies because it makes her look very beautiful. Genji's plan works and Prince Hotaru is quite taken with the beautiful girl.