UFO report and theory of motion.

I was coming home from a date.I remember the moon was in full or just about full. There had been a fire in the woods across the street earlier that day.I was going through the carport and started to enter the house when the lights went out.  I looked to see if there was a fire going on and as i turned around i heard and saw a woosh and a circular dark spot moving across the field.  I went to see what it was and the bottom was circular but the top was triangular.  As it went southeast towards the ocean and disappeared the lights came back on.  Made no sound but the woosh and it was about 50ft above the ground.  There were three bright lights pulsating in motion one after another..right to left.  The lights were white.  The object may have been silver.  The motion of the craft would appear to be using magnetic field generated by the electricity of power lines similar to the theory based on the history channels show tonight about aliens and the earth.  This is what has prompted me to write this to you.  I believe we are on to something.
Witness indicates that the date of the incident is approximate.  PD