I used to carry Fenix E01, and I still do when traveling. I moved to an iTP A3 EOS about 6 months ago.
3 light settings,
Max 80 lumens/55minutes,
Medium 18 lumens/4 hours,
Low 1.5 lumens/50 hours.
better color (of light) fenix light color is somewhat odd.
2 carry modes- A3 has a split ring on end, and a removable clip on side. I hooked it onto my hat about 6 weeks back when I needed my hands free.
On the minus side, it won't stand up, but you can't have everything.