Timelapse covering night until dawn. Colour and brightness go together. Issue is how to control the camera - in auto exposure, the camera will try to maintain the same exposure regardless of the environmental conditions. With manual exposure, the camera will retain the same settings, but this is a compromise between getting some detail in low light conditions and being very overexposed as ambient light levels increase. What's interesting is how quickly daylight (and nightfall) comes - all the action takes place in 5-10 minutes.