Thanks for the replies.

I like to get away from civilization as much as possible when touring but this trip (3-4 months) I need to keep the wifey more happy by being able to talk on the phone regularly and also send emails to line up work as I'm moving o/s and won't have job after touring. Sure I can do this in towns but having an iPhone is easy and charging it regularly is necessary with this approach.

So hub dynamo is a given & therefore the ideal lighting setup to work with this is too!

That niterider minewt setup is looking pretty appealing in terms of output and bang for buck...I could adapt it to a headtorch....don't want to wear the sweaty helmet in camp!!