Expensive option for anything newer then a Gen1 and about the weight of a 3D or 4D maglite.
I measured the power draw on a Gen1 P8079HP tube @ 0.192W using a 6V supply i.e. a couple of 3V RCR123s.
I'm having some fun with the tube (about £90), the picatinny rails and the epoxy.
It works quite well with a 50mm C mount CCTV lens (about £25), IR Lasers and I'm looking to get a collar adapter machined up to do some digiscoping with a Nikon Coolpix P310 camera and FSB-series Digital Camera Bracket digiscope adapter to hunt for UFO's
I'm currently waiting for a faster Russian 85mm M42 F1.5 lens to be delivered, with much more light gathering capability.
It also works with a 940nm pill on a T50 illuminator.
https://www.youtube.com/watch?v=sd0GIe9Ed0wThe intensifier gain is apparently similar to Gen3 but without the Gen3 improvement in size/weight constraints and barrel distortion and tube life.