The Lighter (Hangul: 라이터 ) is one of the three light source items used to lighten up the surrounding area in White Day: ALNS (original ver). The other two being the Matches and the Flashlight. It is the only light source item in the remake.
The lighter lights up the surrounding area. In the remake version, you cannot use the lighter while running.
The lighter is the only available light source that the remake offers. All other items that provide light have been removed.