The whole thing was a ball of light so it wasn't headlamp size, more like a headlamp the size of a whole car, but with an odd glow that is hard to describe ... it was bright, but not sharp or blinding, a quality of light very similar to glow stick light ... but blue-white and much brighter. As it approached the top of the trees you could see the tree tops. They weren't really disctinct at that distance, but you could see them well enough to tell they were tall firs, and as it settled into the forest between them the light from the object filtered out from between them. So I knew for sure it had gone down in the forest on the other side of the lake.
I see similar effects here regularly from car headlamps on a road that runs through the Tsu Tina Nation ( native land ) across from my home. The cars are way over there going along a road between the trees. Plus I saw the object four times in total that night. Three of us saw it the first time. Two of us the second, and me the last two times. ( The girls had dozed off by then ). When it came up the last time, it was getting light and the landscape was plainly visible. This thing, whatever it was, wasn't "one of ours". There is just no way.
After the sighting, I started asking around and I found out that other people had reported similar objects out there in the past. The valley has plenty of weird stories, and since I lived there for several years I was lucky enough to experience some of the phenomena.
j.r.