I’m now also looking into upgrading my light setup and am looking at the following:
Linkbest Electric Bike Light 2000 Lumen Day Running Front Light 49 LEDS Powered High Power Light Bicycle Headlight lamp
To connect it to the julet 2 pin connector I have go get: Julet 9mm Base Connector 2 3 4 5 6Pin Cable Waterproof Connector For Ebike Bafang Display Pin Optional Cable Ebike Accessories
What I also plan on getting, is some heat shrink thingies, so I can connect it easily: Heat Shrinkable Wire Connectors 10/20/30PCS SST21 Waterproof Sleeve AWG22-18 Butt Electrical Splice Tinned Solder Seal Terminal