In general, across multiple lights I own, I get about 1.5X the runtime using Energizer Lithiums over NiMH. These are runtimes I did for the Olight I3E some time ago. I keep the I3E in my two cars, they ALWAYS have Energizer Lithiums in them, because of their shelf-life, longer runtime and ability to work in more extreme temps. And they rarely leak like alkalines.
In this post, I also did some runtime tests for the J5 tactical V1 Pro using different AA batteries, including the Energizer Lithium:
https://budgetlightforum.com/t/-/53397