The Ghost in the attic

The ghost in the attic is back…Several days ago I got up around 2 AM to take my nightly trip to the bathroom and notice light leaking from around the attic access door in the hallway.  I was sure the
light was not there when I was in the hall at 9 PM the previous evening.  Being unsure of the source of the light, I found the step stool and pushed open the door.  I discovered the ceiling light in the attic was on.  Now, it had been months since anyone had been in the attic, so I was perplexed to say the least.  In fact, I was unsettled and spent the rest of the night listening to every sound in the condo trying to determine who or what was in our attic and how they might have gained entry.      
 
In the morning, Alan brought in the step ladder climbing into the attic to investigate.  He found the   bulb in the pull-chain activated porcelain lamp holder was loose.  He tightened the bulb and pulled the chain to turn off the light.  He assured me the chain was too short for some rodent to climb the chain thereby turning on the light. He also confirmed there was no secret access some person could use to enter the attic.
 
Early this morning the light was again shining through the attic door.  So, let’s look are the facts and draw a conclusion:  1. The light was off at 9 PM and on at 5 AM; 2. The only person-sized access into the attic is through the attic door; and, 3. The pull-chain is too short to be activated by a rodent.  Therefore, there must be a ghost in the attic.
 
Happy New Year friends!