I use Magicshine mate
MJ-872 1600 Lumens mounted to the bars on a home made bracket, and MJ-880 2000 Lumens on my lid so I can see the trail and not just the direction my bars are facing!
Love the more powerful light on me lid , nice wide spread
Magic Shine aren't cheap but good warranty & great to deal with !Batteries are great 3.5-4 hours easy at 100% & water proof! also built in over charge protection so something to think about if charging in the shed or garage!
Other's use solar storm which are a lot cheaper!
Try and workout now long you gonna be out for when riding & budget !