I also fly a
P4P+ and do quite a bit of night flying.
In fact, some flights I have taken have been an hour after sunset.
Here are some tips for you that I have found useful over the years:
1. Normally, I shoot in AUTO mode. Occasionally, I will manually adjust my settings, but 8 times out of 10, I shoot in AUTO mode.
2. At night, I always shoot in RAW(not JPEG).....this allows me to pull as much detail into the image file as possible. This is what you need for night time photography and in post production, the RAW format gives you lots of options.
3. For any still images that I am taking at night, I always use TRIPOD mode when I'm in position and set to go......this mode minimizes the Phantom's movements and helps you get that night time shot you want.
4. Make sure you set your Phantom's software to turn off the front nav lights whenever your camera shutter button is used. This makes sure the red lights(and the glow from them) don't show up in your images.
Hope these all help. Safe flying.