Review: Acebeam L30, a 20700/18650/CR123 tactical light with very high output

Acebeam says the L30 is "like a side-arm that takes shotgun shells". That's been done and isn't a great idea, but the L30 is. The high-only tailswitch with all other functions on the side switch is what I would consider an optimal UI for a duty type light. Output is around 4000 lumens until heat limits it to 2000.