• Include LED micro-flashlight as backup (two is better). They’re small, light, reliable, and inexpensive, with good run-times. Both Photon X-Light and Inova Microlight are about $6; 12-15 hour run-times with multiple brightness levels.
AFAIK, the old Photon X-light only has an ON/OFF switch. Single brightness level.
Now, the new
X-light Micro offers multiple levels of brightness.
• A small 2-level AA-powered headlamp might be worthy of consideration as a back-up light.
It
IS MORE than worthy of consideration !!