No energy is 100% free. “light bulbs magnets” is meaningless.
A CHANGING magnetic field can induce a current in a wire or a coil. You have to KEEP MOVING the magnets! That involves energy.
These magnets are not moving. I have no explanation.
A set of moving magnets under the table top would work just fine as an explanation.
“You have to KEEP MOVING the magnets!”
Or the copper coils. That being the case, what we do is surround the entire Earth with copper coils in space. The Earth is constantly rotating, and is magnetized, so we will produce electricity!! So simple.. (Yes, I’m joking..).