.. Lightning the lamp post

Okay, first you would need to reach them.

Use your telekinetic power. If Anna does not want to do it follow the enchanted rose guide.

Then the lamp post should bend when using the telekinetic powers into it.

You need fire.

You had the fiery friend, the baby dragon.

Just ignite him. He needs to eat something.

There are coals in the tavern. Use the baby dragon on the coals to get him spit fire. Use the fiery dragon on the bent lamp post to lit it.