I hope you understand the ANSI standard for runtime. The timer starts at 30 seconds and runtime is recorded once the output drops to just 10%. It's never X lumens the entire time. This standard is used for every brand. It's good to see more brands are starting to state 5 min + 180 min etc but for many they don't.
Sofirn SD03
High - 55min, Med - 2hr 20min, Low - 10hr
Sofirn SD05
High - 1hr 38min, Med - 2hr 30min, Low - 8hr 16min
I also have the Wurkkos DL40
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