Normally I sleep in a very dark room with no lights on. Recently, I started turning a light in an adjacent room on while going to sleep, and leaving the door to that room only slightly open so that some, but not all of the light from that room spills into my room. My room remains relatively dark, but still much lighter than it normally is.

On the third night I did this, I had a significantly more vivid dream than I usually have, and I woke up two hours before I normally wake up. Is it likely that the light is responsible for this?