Hey teacher,

Hope

Light소망이 빛나 means Hope is shining bright

You call Hikari "Light," but how come you don't call me "Hope" but instead "Seongcheol"...Origin of the nickname is unknown, but Seongcheol is a masculine sounding name.

Light성철이 빛이 sounds similar to 성처리빗치, or a bitch used for sexual purpose.

Seongcheol