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Very good, shines brightly, you could say that it works efficiently even at about 100 m. I have it set to about 30 m, which is sufficient, even perfect, for the forest at night. After three hours, there was still 1/4 of the battery left. I didn't check how long it lasts until fully discharged. I rode for about 30 minutes at maximum brightness, and 2.5 hours at the setting with two LEDs, which is more than enough even in the forest. One downside is the vertical setting, as you need to use a key (included in the set), but once set properly, it's OK. The quality of workmanship is, in my opinion, very good, almost noble :). After the first day of use, I am satisfied. It shines brighter than it appears in the pictures. Delivery in 7 days. I recommend.
the light is bright._on full it lasts over 3 hours