Having watched some youtube videos of the stars through night vision devices i wanted to do the same and see it for myself, the light-gathering power of the P8079HP is impressive, the manufacturer's manual says it multiplies incoming light by 100,000.
Some specs on the tube here from the manufacturer's manual :
https://www.dropbox.com/sh/rnnkvasq5t6o2dy/AADmr9Ftu9FrdnRR2OohXQJpa?dl=0
It takes from 5 to 6.75 DC at 35mA max in my experience though the manual says 50mA max, these tubes are old so mileage varies.
To use it as a stand-alone unit it needs an objective lens in front of the input and an ocular/webcam/video-device-of-some-sort plus power to the device, usually in the form of an AA battery or project box with a switch, and maybe a power LED if you're feeling fancy. A few people have built some very nicely finished units, this thread is informative and has lots of photos, though most of it is to do with using it for hunting :
https://www.ar15.com/forums/Armory/DIY-Cascade-Tube-Thread-/18-359614/?page=1
I've been putting my one together, i'm gclarke66 on that thread, the most recent post since it's a fairly inactive thread.