This lamp has three brightness levels, is very good and stable and Processed has a super bright light at the maximum level. The lamp is suitable for short-range, So not so good at 20m glow in the distance. For work unbeatable in about 5-10m.
What is not so nice on the lamp, it requires three AAA batteries or battery's. A unpraktischr Quantity, better would be a battery AA, which one would have to replace it quickly. Nevertheless super lamp.