Thought I would chime in on Nile LED's.
I have two Boxers and Varsa lights. Be forewarned that in cold temps, these light will literally freeze up on you. I had my lights outside in 20 degree temps and they would not turn on. If I Placed the light outside from a warm car, it would light up, but after say 30 minutes in the cold, I could not adjust the light output. I was frozen at 100%, or 75%, what ever output level I had been using.
I spoke with Nila about this problem, and, once I sent my lights to their service center, they acknowledged there was a problem, I purchased these new in 2014. Apparently they made a change with the mother board, used some type of different components that are affected by cold temps.
Nila is aware of the problem, but as of today, they still do not have a work around.