I went to my step-brother's wedding that was held in the middle of nowhere in SE Kansas. It was about midnight when we left on a moonless night. I could not believe the light output of the TK40. My headlight looked like penlights after playing around with the TK40 on my way home.
I took it camping a few weeks later and the 13 lumen mode was great and didn't have to worry about spare batteries (which I had anyway). I loved it so much I had to stock them at
SunflowerAmmo.com