It can. Fire damage caused accidentally by a candle is normally treated as fire damage, subject to the terms of the policy.

How do candle fires start?

• A candle is left unattended.
• A flame is too close to curtains or shelves.
• The holder is unstable.
• A pet or child knocks it over.

Keeping candles away from anything that can burn

• Put them on a stable, heat-resistant surface.
• Keep them away from curtains and decorations.
• Keep them out of reach of children and pets.
• Put them out before leaving the room.

Buildings and contents can both be affected

Check both buildings and contents limits because a small fire can damage the room itself as well as furniture and possessions.