Electric lamps (since 1950)

Due to the continued risks caused by petrol lamps, it was absolutely vital for portable electrical lamps to be introduced in firedamp pits. The electrical lamps have a special advantage in that they can be used under all operating conditions. Its luminous flux also exceeds that of the petrol lamps fourfold. The electrical lamps are used to this very day in mining operations as head lamps which were soon to replace the bulky and heavy portable lamps.