This time elapse was taken with a Nikon D7000, each exposure was 30 seconds at f/5.8. There were 4 shots each 5 minutes from about 9pm (April 8) to 5am (April 9). I put about 500 of these 6M images in FCP and it rendered a 65G mov file. This was then put back into FCP for retiming.
This needs color correction but I assume that the decrease in saturation is due to the lack of light, and not a camera defect, so it natural. Please someone add a comment if I am wrong about this.