It is German for hunter. Also it is the last name of the bravest, most successful, and solo titan shifter in the Scouting legion. Also the graduate of the 104th trainee squadron, is in a confidential relationship with corporal Levi Revai (often mistaken for Reavaille).
When used in the sense of the natural agent that stimulates sight and makes things visible, it is an expectable word for my vocabulary. The issue is when the word Light is used in the source of a name claiming the evil man Light Yagami (Light written in japanese with the symbol for moon). The man is an evil murderer who brought down the hero and source of justice for all of the world L, using his notebook called a death note.