Occasionally I have had requests about how to turn the lights in a room (making it a dark room) but then being able to turn the lights back on.
The Scope of the Dark Room was created with Inform and has IFID CBC39D21-95E2-42CB-8A3B-E24E84FDA93D. To play a work like this one, you need an interpreter program: many are available, among them Zoom
for Mac OS X and for Unix; Windows Frotz or Windows Glulxe for Windows.