I have a set of these, my use for them was so my kids could find the hammocks in the night, then turn them off before bed! Worked very well at this past PGF Mahha, well at least the kids thought so.
For backpacking I just use my headlamp, multiple brightness settings for multiple purposes.
Formerly known as "Cranky Bear"....
"yesterday is history, tomorrow is a mystery, but today is a gift---thats why its called a present" - Master Oogway
It's always best if your an early riser!
I like hiking as it's like exercise!