ProductFeatures: Workingenvironmenttemperature -10°C +50°C Startingenvironmenttemperature 0°C +50°C Waterproofdegree Underwater120M Continualilluminatetime 180mins Brightness 2700LM Bulblife-span ≈3000hrs Irradiationdistance ≤1.2km Colortemperature 6000K(Option:4200K, 5000K,8000K,10000K) Opticalefficiency 70LM/W Material ALU Weight 1.56kg Electricityparameters: Ballastinputvoltage 9 16V Workingvoltage 12.5V Workingcurrent 3.3±0.2A Startingmaxcurrent <10A Poweroutput 35W Outputtemporarymaxvoltage: 23KV Batterymode ICR18650X3S2P(6600mAh) Batterychargevoltage 13.8V±0.1V Batterylifespan (chargeanddischargetimes) ≥500times