What is “real”? How do you define real? Real is just electrical signals interpreted by your brain.

Post-modernist nonsense aside, false. Your presence or lack of doesn't change reality. The limitations of your senses doesn't effect reality. Therefore, reality is not limited to your electrical impulses.

The sun still exists even if you're blind, you just can't see it. The sun will still exist if you die tomorrow, you just won't be around to perceive it.