Zebralight H52 300Lm from Illumination Supply.
It produces a steady 300 lumens with a single regular AA battery and with the hopped up rechargeable battery they recommend it has a 500 lumen turbo mode that lasts a minute before kicking back to 300. I typed the word illumination in the discount code and got 15% off.
JJ Hack prefers the H600 Mk II Zebralight that produces over 1000 lumens.
Really appreciated the tale of your presents to and from your Dad.
Sounds awesome. I've been wanting to try one.
My dad is more generous than I because he'll never get the gifts he got me. But everything I get him, is coming back to me...
Travis