No, it's not similar to the reflection on the lake, as that is caused by the specular reflection on a clear surface (mirrors and water), and specular reflection would come toward the viewer, as it does across a body of water, because it's an optical illusion where you see more brightly the reflection that is moving toward you. That's why it follows the viewer. It's a reflection that enters the viewer's eyes, or the camera's lens. Firstly, clouds are not conducive to specular reflection like still water or mirrors or glass, so they would not create a specular reflection, and, secondly, if that's what was going on here, you would see the light coming all the way toward the camera.