Very large, bright white light, not moving, vanished when I looked away.At approximately 11:10PM CDT, on Tuesday 11/1/11, I was working at a rural location in the Texas Hill Country, on a high hilltop near a location off of FM 1323 & Big Sandy Rd. near Round Mountain, TX. approximately 6-7 miles West of Hwy. 281. The sky was clear, around 60 degrees and a 10-15 mph wind.As I was leaving the location, I had placed some equipment in my truck and noticed a very large, bright white light to my South, towards Johnson City. It did not compare with Venus, Saturn, or any other planetary object. It resembled aircraft landing lights, but 5-6 times larger, and about 30 degrees above the horizon, but appeared to be maybe only 1-2 miles from me. It was the size of a dime at arms length. It had the flickering illusion you see with aircraft on approach, but it wasn’t far enough away for that.From this location, there are absolutely no airports, hospitals, etc to allow for low aircraft, and I have never seen a light like this. I watched it for about 15 seconds, and it didn’t appear to be moving. I foolishly turned my back on it to lock a gate to the location I was leaving, and in that 5-6 seconds, when I turned back around it was simply gone. I had a wide open view of sky, and no where for it to have gone. It had either just “turned off”, went quickly up or down, or zoomed off while I wasn’t looking. The sky was empty of any aircraft what so ever. Only stars and a ¼ moon setting about 60 degrees to the right (West).While I do not consider this a major or impressive sighting, only a very strange light, what does bother me is how it left me feeling. I am usually very much wanting to look for phenomenon such as this when out in the country away from the city lights. I have seen my share of very unexplainable things in my years, but this event left me feeling very uneasy and wanting to get out of the area immediately. This is very unusual behavior for me. Anyway, I simply wanted to make report of it in case anyone else saw it and reported it too.