The product is researched and developed by our company , which can meet the demand of night work for railway, electric power department, public security, steel department and petrochemical department. Features:Transition function:While there happens to be power cutting or no power in the working places, it can be used as 500W(short time used) or 350W(normally used) power supply for home appliances, electric tools, electric equipments, apparatus and office instruments est. with voltage of 220/110V.Luminous light sourceUsing self-prepared power supply or using 12V/24V power supply on vehicle and vessel.Efficient and Energy Savingit can be easy switch between strong light and work light ,can work normally underwater. The max luminous distance of strong light can be as far as 1200m& Luminous flux is 2500 lumen. It can continuously work for 5 hours by strong light with it own power supply, while work for 8.5 hours by working light.Water-proof and durableIt can work under water normally with Hermetic design, and withstand strong impact and collision by using special imported alloy and bulletproof crust.Flexible useWe can revolve the lamp socket within 360 angle. The lamp socket can be fixed on the light bracket or other brackets, and also can be carried on hand. The whole body can be moved flexible and easily operated. If you use it with tripod, it can be adjusted up and down from1.2 to 3.5m. The air pressure will protect it automatically when it drops.ReliableAdopting high-octane batteries with no memory that can be charged at any time, once fully charged, the storage capacity will not be less than 95% of full capacity after a half year, and not be less than 65% within two years Intelligent protectionWhen electricity is insufficient, computer will remind you to recharge it