I've used the flashing light several times, at a auto crash scene, or to mark an object to find later.
There is no "DUMB" feature, only one you're not going to use..........(just like on a stereo that has 200 settings)
cheap 500 lumen costco units are poor at basic illumination.
here is every choice in the world, and then some........
https://www.banggood.com/buy/flashlight.html