Lumens, want low and very high.
I have two of your lights (both excellent), and wanted to get another similar to a favorite, the Streamlight Scorpion HL.
I do like the rubber armour on the Scorpion, as it helps when I mouth hold it.
Unfortunately I could not find an Olight equivalent for this need.
I don't worry to much about run time, as I have extra batteries in all situations.
Your products are very well built.