... environment protecting. High efficency CE&ROHS compliant Lifespan :50, High power square LED floodlight 42W Applications: gallery, museum, offices, hotels ... lamps, protection class IP66.3.Lamp light source adopt imported high-power ultra-bright LED chips, to ensure high ... > 50,000 hours4.Built-in and external constant current power source, stable property ,operating voltage may be based on actual ...