kimble
Veteran
It's hard to get out of Birmingham in any direction without dealing with hills. I was absolutely amazed by the ease of cycling when I took my bike to flat London.
I did the reverse when I moved here about 5 years ago. Previously the Col de Bow Flyover counted as a serious hill, so the Lickeys came as something of a shock.

Anyway, I'll join you on this ride. My only concern is that the Lezyne Macro Drive is only rated for 4.5 hours at full power, but I do have a Micro Drive too so it shouldn't be a problem as long as it starts getting lighter towards the end of the ride.
Excellent.
As mcshroom says, it should last the night if you turn it down when in streetlit areas or riding in a group. I've done FNRttCs and the like with an IxonIQ, which has similar battery life on full power and never had a problem with it lasting the night when used sparingly. Dynamo lights are lovely, though.