How to choose headlights?1.Beam pattern：The best headlights are not simply the brightest，Creating brighter headlights is easy,the difficult thing is concentrate light exactly where you need it,Uncontrolled bright light is not ideal for driving and can create dangerous glare and blind area2.Stable illuminance:illuminance means effective luminous flux，it determined by beam pattern，Heat management，quality of internal electronic components3.Heat management: it is a critical factor in the performance of LED lights,some led lights is very bright in the beginning，but emit a weaker beam of light when they get hotSpecification:Color Temperature: 6000K pure white light Lumen:6000lms on high beam,3800lms on low beam Waterproof Grade:IP67Voltage:12V DC Housing: Alluminum Alloy Life Span:50,000+ hoursCompatibility:Truck,Offroad,4WD,Tractor,ATV,Boat,UTEMeasurement:7.91"(Length)x5.65"(Width)x2.53"(Depth)