I really like this: https://www.petzl.com/US/en/Sport/Headlamps/IKO-CORE

Super light weight, can use core rechargable battery or 3x AAA, and fits on a helmet well. It replaced a ~6-8 year old Petzl thats switch finally gave out.

Downside is it looks goofy AF. Can be had for ~$60 on sale.