... applied to industries related to petroleum, chemicals, metallurgy, electric power, railway, coals, fire prevention, public security, ... button.&specifications:1. Light source:Advanced LED2. Battery Rated capacity: 1800mAh3. Light output:250LM4. Light lifetime: 100,000 ... applied to industries related to petroleum, chemicals, metallurgy, electric power, railway, coals, fire prevention, public security, ...