Light beam travel across roof-tops...1964.

I was a paper boy for the Fort Worth Star Telegram at the time. I was about 14 years old. 
The pre-dawn night was clear and cold with no moon.  Gathering my last newspaper bundle, I noticed the roof of the house across the street, was brighter than all other roof-tops...a kind of glow..almost a fluorecsent white-ish blue aura. 
As I was looking at the roof of this house, (I remember thinking perhaps there was a re- placement of new shingles), when the left-hand edge of the roof began to darken.  I began to walk towards the house, and noticed that the house roof-top to the right began to brighten. I arrived in the front lawn of the first house, and could see that the "glow" was moving from left to right, very slowly.  There was not a strong definition line to the edge of this "glow" as it moved from house #1 to house #2.
Now being positioned some few feet away from these houses, I could discern a subtle sort of "beam" of light emanating from the roof-tops, and travelling into the sky at about a 70 degree angle.  The "beam" reminded me of how a light beam appears when shining a flashlight into the night sky, only larger.
As I observed this light moving slowly to cover most of the roof of house #2, it began to fade, (not click-off), rather quickly and was gone.  I stared intently at the star-lit sky for several minutes to see where the light was coming from.  I was not able to see any object, aircraft or otherwise.
I do not recall if I perceived the light beam reaching the ground between the houses as it travelled.
I reported the sighting/phenomenon to my route manager, as well as my parents and some other folks.  I remember being frustrated that no one seemed to be interested, and my story being received with funny looks and jokes.
However, years since witnessing this unexplained sighting, and being college educated, I've yet to receive any plausible, scientific explanation for what occurred.
I've travelled past these houses several times over the years, to see...to find...I don't know what.  
I do know that I had to report, officially, to someone what I saw and would welcome qualified inquiry and discussion.
Source of report indicates that the date of the sighting is approximate.  PD