The isolation spins its mysterious cocoon, focusing the mind on one place, one time, one rhythm - the turning of the light. The island knows no other human voices, no other footprints. On the Offshore Lights you can live any story you want to tell yourself, and no one will say you're wrong: not the seagulls, not the prisms, not the wind.
We should note that this latter type of shift was successfully amplified to a considerable extent by Russian physicists using the intense light of a ruby laser whose wavelength is close to that of a transition of the potassium atom.