...and to chuck another light in for you to consider if you want to use AA batteries...
Busch & Muller Ixon IQ £55-£80
depending where you get it (bike24 was good when I got mine)
I cycle mostly on unlit country roads and paths, in lots of rain, I'm happy with it, good rectangular beam pattern, two settings, first one is the German minimum cycle requirement 10 lux, still ok enough to get you through unlit areas, claimed 20 hours, high setting 40 lux lasts 4-5 hours, very good for unlit roads. Good thing is it reverts to the low setting when the batteries get low, giving you at least 20 mins on 10lux, could have been an hour, it's never gone out on me. (it also has the same light bracket as the smart lunar)
They also do a model that comes with rechargeable batteries and a plug and jack to charge the light directly.