I have one ready from a previous thread where I thought I'd nailed it. I took this picture when I got my new camera and as I was taking shots using a tripod at night a passerby asked me what I was doing, and when I explained the picture and the bothersome light in the top right corner he said "I can turn that off for you, if you want". It turned that he was the building operations manager and could actually turn off that light! I was working in that building at the time, somewhere on the 16th floor. So in which city is this building?