What works for you, explain your setup and what you'd change?
You can't have a single light, and there's the factor between riding lights and map/nav lights
requirements -
light 1 - handlebar mounted,
a)external li-ion battery pack with cable connector, 220V charger
b)integrated system with rechargeable battery, 220V charger
c)AA powered handlebar mounted
d)hub dynamo
light 2 - helmet mount -
anything goes, but normally a headlamp ziptied to helmet.
light 3 -
the spare, actual light or just batteries?
I went from Dynamo to battery for simplicity and the battery doubles as bank to charge other electronics.
The bike light was the Magicshine Monteer 5000s, but would like to get the 8000 with remote control.
My headlight was the Petzl Actik with spare rechargeable battery.
https://www.petzl.com/INT/en/Sport/Headlamps/ACTIK