The mining lamps type ELM are EEx I lamp designed for working environment with potential explosive atmosphere (especially for coalmines) and is certified according EN 50033, EN 50014, EN 62013-1 and EN 62013-2. These lamps are patented in Romania and all around the world. The lamp has two distinct parts: the battery and the cap lamp. The worker is not disturbed in his activity by the lamp because the battery can be attached to the belt and the cap lamp to the helmet. Proper choice of materials and good executions indicate this lamp to be used in very hard working environments. Normal degree of protection is 54, therefore it is protected against dust without pressure and omni directional water drops.