I had a really vivd lucid dream last night, and after realizing I was dreaming, I kept saying "Attain lucidity!" or something like that, which doesn't make sense that I would say that if I was already lucid, but oh well. Anyway, in my dream there was a lamp, and I remembered reading about how you can't adjust the light your dreams, so I tried turning the lamp on, and succeeded. How is this possible?