Hello some trails that I did back in 2015 using a Nightsite Wolf, at a ir wave length of 850nm  i was getting  much better visibility at distance and if I can remember correctly the night Wolf was at that time using 850nm,the problem was that at that wave length the dull red glow that is unavoidably emitted by ir can still be seen quite easily and I was getting problems with charly seeing this and turning and running before I could get him in distance with my .17 hmr,so I trailed a (T67 950nm) i