Another vote for the moon vortex pro on the helmet. I bought their go pro mount for it and attached it to the helmet with a go pro sticky mount. It’s lretty light – certainly lighter than the other 18500 torchy light I had on there before.
Got a Ryder 1600 lumen light to go on the bars this year – looks outrageously bright in the garage but not used it on a trail yet. Both lights are self enclosed with no separate battery pack which is refreshing.
Both were half price in sales – think the vortex pro was around £30 and the Ryder £50. The latter has a lifetime warranty for what thats worth.