How about a Beam of Light That Flips a Switch That Turns on the Brain? How’s that for a new way to get turned on? But what’s it like? Take a look?
See the neuron synapses in red? See the photosensitive protein on the cell membrane in green? For a layman’s discussion of the physics and chemistry and experiments with light check the link above.
But what’s it like? you ask. You mean you want to know what it feels like? Ha Ha Who knows? Ask a zebrafish? Or why not read Thomas Nagel’s article, What Is It Like To Be A Bat?