For a couple of weeks, I've been feeling my old black cat's presence. She has been dead over four years now. I got two more cats. Last night at exactly 3:34 am, I woke up because the lights were on in my house. I got scared so I prayed to God to put an angel at my bedroom door. I looked out the bedroom door and saw a cat. I first thought it was my kitten. I called to him, but he disappeared into thin air. I looked again and there was my dad's old cat. He has been dead for maybe 2 years. I got really scared at that time. I ran down stairs to where my mom was sleeping. I told her everything. She believed me because once she saw a ghost.
I once was playing upstairs with my kitten and he started to go crazy. I thought maybe he saw our old cats ghosts. So I am not afraid right now. I am glad!
I guess what I am trying to understand is why you'd be upset the lights were on? I can't tell you how many times I've fell asleep with the lights on or left them on by accident. Living in a house with more then one person only means someone else could have left the lights on.
Your cat freaking out isn't that big of a deal. Just a second ago my cat dashed across the room and rolled under the couch. I don't account that for paranormal activity, cats are just weird.