I own several Astrolux lights. C8, Ft03 sst-40, and the FT03 xhp50.2. Never had a single problem. I don’t know if these are issues in perhaps just the smaller or AAA lights.

One thing I will say is many manufacturers have a tendency to overstate output (specially Japanese) but most of us overlook this due to the cost being a quarter of some of the name brand expensive lights. Take the Astrolux FT03 xhp50.2 for example, it’s advertised at 4,300 lumens. You can find it on Banggood for less than $40 and on a groupbuy even a bit cheaper. It’s a monster of a flashlight for the price and even usb-c rechargeable. Nothing I have seen in that price range can touch it. So if it happens to output a few hundred less lumens than advertised, it’s still worth it. But to me it looks like it outs out every bit of what it is supposed to. Maybe you have just had a bit of bad luck.