Short answer, not good. But let's watch Tom of Moondog Industries try out a US$4 taclight he got from seller on Aliexpress... "The LitWod product description claims 6200LM but that's impossible out of this CREE type and battery?! The light started smoking after less than 60 seconds of continuous high mode, went dim, and now won't turn on at all.

I bought it for $4.42 but it has dropped in price to less than $2.50 probably because it's quality is so poor they're trying to get rid of them."