Buy a Merciful Heart the Light From a Buddha Mind calligraphy wall scroll here!
心光 can mean the light from a Buddha's mind or “merciful heart.”
This would especially be the light emanating from Amitābha.
Note that the character 心 can mean mind or heart. 光 means light or brightness - but in this context can suggest a glow of mercy or compassion.
This can also be a Japanese surname that is romanized as Shinkou or Shinko.