Very bright light in the west

I observed a very bright, what appeared to be yellow/orangish light in the western sky late at night. I saw the light and noticed it because it was so bright. I thought this might be Venus and it could be the case in which case ignore this report. The light appeared to be moving very slowly and appeared to be dipping somewhat rapidly at times but I'm willing to admit my eyes could be playing tricks on me. I observed it for maybe 15 minutes at which time it definitely moved as I noticed it moving further towards the horizon. It was also becoming more and less bright but I couldn't determine what might be causing this. It eventually moved below a line of trees at the end of the 15 minutes at which point I could no longer see the light and it never reappeared. I can't confirm what it was. Maybe its nothing in which case ignore this. But I enjoy watching the skies at night and haven't noticed anything like this before. It struck me as odd so I thought I'd report it. Do with this report what you will.