I set this shot up before i left work last week, to try and get sunset and the city lights coming on, however I totally failed to think about the reflections on the glass in the office, this timelapse could have gone on for another 2 hrs worth of seeing the chairs and desks in my workplace, but I decided to cut it once the reflections started to take over from the outside view. Something to remember for next time!
On a more positive note, i have finally found a really good CHDK script for sunset/sunrise timelapses. If you have CHDK look at the CHDK forums, in the scripts section, for the Sunset F16 script. works wonderfully, even if it takes 4-5 shots at the beginning to get the exposure right.
I will set this shot up again tonight, with less reflections (i hope!)