bamboo shoot
emitting light
bamboo shoot was
peeled off
original haiku "筍の 光放って むかれたり" (converted to modern orthography)
composed by WATANABE Suiha (1882-1946)
roughly translated by the blog owner
This haiku might hint the Japanese oldest story named "Taketori monogatari" in which princess Kaguya was born from a mysterious shining bamboo.