Lights In Our Summer House

I'm new on this website and this is my first story. I'm not fluent in English so I apologize for my bad English.

I've had many paranormal encounters in my life, but this story I'm about to tell is about some encounters that happened in our summerhouse, where we spent all our summers. I'll post some other stories an other time. So here we go...

My parents bought a plot of land ten years ago where they built a house and a garage. The garage is around 100m away from the house, and we used to live there while the house was being built (The garage was fully equipped with bathroom, kitchen etc. At the time it was more a small house than a garage).

The first paranormal encounter happened to my mother while we were living at the garage.

One night my mother woke up for no reason at 3 am. She opened the window of the bathroom, which has a view on the house, and saw a strange light next to the house. She believed that someone was taking a look at the house and didn't like that. At the time my father was on a trip, so she woke me up, as well as my sister, and told us that she would go out to check what was going on and if she didn't return after some minutes, we should call the police. So she exited the garage and went towards the light. The light was floating in the air and had no source. It was more like a floating light ball, and no human form was next to it. It didn't move until my mother got some few meters away.

My mother was very curious and got closer to it, but then the light started to move slowly. My mother continued to follow it. At a point the light stopped next to a huge tree and vanished away in the horizon (the plot is on the top of a hill). When my mother realized what had just happened, she rushed back to the garage.

Some years later, my sister and I used to share the same bedroom. One evening, we both went to bed at the same time while our parent's were still sitting on the terrace upstairs. When we were ready to go to sleep, my sister switched off the light. A few seconds later, a big pure white light invaded the room. It was like a flashlight. We didn't feel insecure or frightened. When it was gone, my sister rushed to my parent's to ask if anything happened, a lightning or anything. But nothing had happen.

The strangest thing about this light was that it had no source, or should I say, it shone from everywhere. My sister and I were facing different directions so she could see what happened behind me and I could see what happened behind her. No shadow, just light.

The next morning, we asked my father what he thought had happened. Being a real scientific man, he told us there should be a rational explanation, but he couldn't find it. Maybe a chemical reaction, but we didn't smell or find anything different.

Later, we met a couple that told us they had seen in our plot one evening in the winter what we call in Greece a small church with light in it. I'm not sure of what it is called in English, but a small church (eklisaki) is a small chapel where people use to have an oil lamp and an icon.

They told us the chapel was next to the big tree, the same tree where the orb stopped. We then started to search in the plot's history. The plot used to be a vineyard. No house was built there, but in the old days people were scared to go there because they could see things, but I haven't got a clue of what they saw. We also found out in the records (? Or archive?) That the area used to have the name "old church".

We never felt insecure or frightened in this house, and we still enjoy our vacations there. On the contrary, one of the reasons my parents bought that plot, was that they felt welcomed on this plot. I would like to point out that I'm not really a church person.

I hope you liked my story. I will be pleased to answer any of your questions.