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Well I'm using the Sinewave cycles Beacon, because I want its ability to charge other stuff too without needing a separate usb charger....plus it can be run upside down due to its symetrical beam...but it's not exactly cheap...although the built in sinewave charger makes it good value to me.
Mount wise I just received a go-pro to dynamo 10mm mount from this guy, which means I can mount it to the gps unit....
choice of lights .. I cant see any more than Revo and Supernova.