Getting into night vision. So I see they make 850nm and 940nm on the same product. I did some searching youtube, videos and from what I can tell is. 850nm is brighter and shoot further. But have a visible red glow to the naked eye. The 940 is not as bright and is only good for short distance. But is invisible to the naked eye. That's all I can find on the difference between them. Or are there other pros and cons?..which one would you choose and why when getting into night vision.