OK, OK, so not that many LED guys here. It was worth a shot. The guys at Candle Power Forum concur, it's a 45.
Props sell the story. This one has 3 heads instead of the typical 1. I have the version prior to this with 1 large head and a quad LED emitter. For those who might be curious, this series from Fenix is 10 plus times brighter than a typical 3D maglight. It runs on 8 AA cells.
I'm guessing 99.9% would think this prop was designed at pinewood for the shoot. The suits, helmets, etc. certainly are.
Vehicles and ship look very much like Ron Cobb from years past. Yes, Cameron used Ron's work.