Are budget Amazon flashlights with huge lumen claims worth buying?

Specialist subreddits are blunt about this: advertised figures like '9,000 lumens' or '2,000,000 lumens' on sub-$30 lights are not credible. Real output is usually a small fraction of the claim, and r/flashlight regulars consistently recommend brands like Convoy, Sofirn, and Wurkkos over zoomable no-name lights at the same price.