I have two Hexbright Flex lights coming. I'll be glad to post my evaluation.

With regard to ruining an intruder's night vision and other tactical uses, lumens won't tell the whole story. A lumen is the unit with which we measure the total amount of light output. Candela is the unit for measuring the peak luminous intensity.

A 90 lumen light with a tightly focused hotspot can be blinding and entirely adequate for tactical use. Four hundred lumens of light where it's mostly spill may not work for that purpose.