Rabbi Daniel Glatstein (The Light And The Splendor, p. 336-337) quotes the Rokeach, Rabbi Elazar Rokeach of Worms and mentions the following parable:
When a new building is complete, the first inaugural event is to "turn on the lights". Hashem created the world, and at the end of His creative process, He inaugurated the world by tuning on the lights!
In the footnote of this book, the Rokeach is mentioned (Rokeach HaGadol, Hilchos Chanukah) but I can't seem to find this parable. He seems to be citing the Yerushalmi that explains that there were 36 hours between the creation of the special light and the moment it was hidden away by Hashem.
Does anyone know if this is actually attributed to the Rokeach and where this can be found?