From quality, Nitecore. It is the second flashlight I buy from the company. The first one lasted 4 years under very intensive and demanding conditions. I have no words about its brightness. Amazing ergonomics and durability. The price is a bit high, but it's worth the money. When used at full brightness, it heats up the body quite a bit, to the point where it becomes uncomfortable in the hand, so there you will have to compromise on its performance, but even at 25% intensity, its beam is still quite bright.

Average lens, I do not recommend it, guys. There are much better options out there, it's a waste of money. I paid 100 euros for nothing, don't make the same mistake

I bought this specific headlamp because I wanted to have a high-quality headlamp. What I didn't notice in the brightness specifications is that in turbo mode it says the illumination duration is 2700 lumens for 45 minutes, but it also has an asterisk which, in small letters below, says: the runtime for turbo mode is tested without temperature regulation, without understanding what that means. I just point it out so that someone doesn't think it can last 45 minutes in turbo mode. The actual duration in turbo mode is about 30 to 40 seconds, then it drops to the lowest setting. Other than that, I am satisfied with the construction, size, and battery life.

I have it for two weeks now.
The positives:
It has a sturdy construction.
It has many lighting options.
It has very strong lighting.
Good fit on the head.
Easy removal and repositioning.
Waterproof.

Negatives:
A bit heavy and bulky for the head.
If it is turned on at the highest setting, the battery runs out very quickly...around 10 minutes!
Very slow charging