... no warm up or cold start problems7.Solve 4 difficulties for led packaging, heat sinking, operation life span, luminous efficiency ... ensure clients benefits.5.Warrantly:2yearsApplication:Widely used for warehouse,supermarket,industrial pot,workshops,toll stations,gas ... stations,stadiums,exhibition,commercial building Cree or Epistar 60W 6500lm latest design 3528 SMD e40 street light led(CE&RoHS)