This head lamp Atex dimmable from Petzl (zone 2, 22) 2x batt (LR6) AA incl 100Lm 90m and is for explosion-proof application. This lamp ensures that you have your hands free and directs the beam where you look. Petzl manufactures very qualitative, innovative headlamps. Wearing a headlamp on your head is very practical and common today. 30 years ago (Petlz invention) is was not. Since then, Petzls have become increasingly light, compact, durable and powerful.