I have found the output drops a bit (if I had to judge it I'd say about 30%) from my e-light
when it's on full power in the first hour. after that it's pretty constant until it's close
to dead. so I don't find this too much of a problem. I also hardly ever use the thing
at full power.. and with a button cell the spare battery is very light. I've had no problem
using it for reading and chores on a weeklong trip with one fresh battery (I carry a spare
anyway).

it's my goto light for non-winter. In winter where I'm more likely to use it more
and actually need full power light - I go back to my tikka plus.