Personally I bought a LED head torch from a camping shop with a flip up red filter. Great for night flying when I did my night rating (free hands) very bright for my walk around now I'm in the airlines (if I remember its in my bag and don't just use the a/c torch to the eternal chagrin of the engineers). Finally I have to read at night to go to sleep and the hands free red filter means mrs and baby g can sleep undisturbed.
Mine's a petzl tikka. But any should do as long as it has the red flip up filter.