Just fine. I don't understand why some people are bothered by the light in their eyes. Maybe it's a matter of positioning/head shape

Everything is fine. Quite powerful. However, something is stuck on the red button, and I can't use the two brightness levels. But for a night walk in the forest with fresh batteries, it's great

During prolonged use, around half an hour, don't expect hours, it causes pain and discomfort at the point where the lens rests on the head.

Very good flashlight with plenty of light. For frequent use, you will need rechargeable batteries because they run out faster than other flashlights with less light.

Incredibly powerful. The light hits slightly from the bottom into the eyes, but with a little tape at the bottom, it gets resolved and it's wonderful. Worth it.

The lens is excellent. It is very powerful and has a very good battery life. While riding my bike at night in a place with no lighting at all, the flashlight looked like car lights, literally filling the entire road. Drivers coming from the opposite direction signaled me to turn off the flashlight because it was blinding them. However, they don't seem like 400 lumens to me! I also use it for fishing and it is very convenient as it has a system where with a button you can focus the light on the main beam to see at larger distances up to 60 meters or on the two side lights for closer distances, when you want to tie a fishing line or do some manual work in the dark!

A cheap solution. For normal use (walking, night photography) that I am involved in, it's fine. I don't have an opinion on running because weight (90g), head grip, and vibrations play a role there. Let's not forget that it takes 3 conventional batteries. I would have liked it to be stronger with a slightly better focus on the light, but the battery life is quite satisfactory with mild use (low scale and intermittent dimming).

I must have received a defective product as it opens, so it needs adjustments in brightness and overall it's all over the place. I will return it and see what happens.

The lens has two types of light. White and red. The white light is very powerful and clear in three different scales. The red light is used in cases where you want the eye to remain adapted to dark conditions! It is supported quite stably on the head. It can be used in most outdoor activities except running.

Very powerful but the battery drains quickly and needs to be changed frequently if you need strong light