I have a Cygolite hotshot Pro 200. You can dim the solid mode down to extend runtime to 200 hours.
You can slow the flash
frequency down to give up to 75hrs in the triple flash mode (one very bright flash and two dimmer ones).
The Hypershots have similar features, dual optics and a bit brighter.
https://cygolite.com/product/hotshot-pro-200-usb/