Transformers: The Comeback
This is just too perfect to be a coincidence. Perhaps the transformers do indeed exist among us, concealing themselves in plain sight, as Optimus Prime stated. However, there is a possibility that this is merely how the emitted light is projected onto the wall.
On the other hand, why would they switch on the lights while the weather is still pleasant? This can only imply one thing: the Decepticons are attempting to reassert their hold on the planet.