My LM33 is about as bright, perhaps just slightly less, than my L1T v2.0 on low, which is rated by Fenix at 16 lumens.
I'm honestly not sure about the runtime, though. BateryJunction's specs say 4 hours on low, while LumaPower's specs I saw said 8 hours. The 8 seems more reasonable, but who knows?
Anyway, a nice little light, particularly now that it's on sale.