I own several newer lights and was wondering what lights would benefit from the above listed cells.
I'm leaning towards my Quark X 123^2 tactical XML since 18650 cells don't fit the Quark body.
Other lights I own are the
EagleTac T20C2 MKII (XML)
Klarus XT-11 (not recommended to use RCR cells)
Fenix TK-21 (not recommended to use RCR cells)
I do run all of the above on 18650 batteries by Redilast and AW (except the Quark).