If you started this course early and are looking for the lights image re download start-assets on Git-Hub. There are there.
https://github.com/GDquest/Your-First-Game-Godot-2d-Platformer/releases/tag/1.0.0
Nathan Lovato
replied
Thanks, I updated the download at the start of the course as well, it now has the checkpoint projects for the last 2 chapters, and the light.png image.