1 save 50% energy, high brightness, bright dipping is blance. 2 professional circuit design, each set of lights work independently, can avoid the single bad light affects the whole lamp lights effect. Product size 270*283*85mm Inner boxpearl woo360*350*150mm Outer box K=k 540*380*360mm 4pcs/carton Net weight (kg) 3.65kg Gw(inner carton) 4kg Gw(outter carton) 17.9klg