The last words of Goethe were not 'Mehr Licht!' (More light!) but 'Mehr Nicht!' (No more!). The story could, under the cover of fiction, be the following:
Kräuter, the character in Thomas Bernhard's fable 'Goethe schtirbt' (not Goethe stirbt, as would be correct) argues that Goethe slept with a copy of Wittgenstein's 'Tractatus Logico-Philosophicus' under his pillow. In the last years of his life, Goethe - German poet - became so obsessed with Wittgenstein - Austrian thinker - that he sent for him to embrace him during the last throes of his life.