1. WR-LDxx01,xx means LED power, 01 type LED power has 10W,20W,30W,50W 2.Small size, unique design for heat dissipation Product Description:1. WR-LDxx01,xx means LED power, 01 type LED power has 10W,20W,30W,50W.2.Small size, unique design for heat dissipation.3.Lamp body, frame and tail are made of die-casting aluminium alloy, its structure is light and strong. 4.All fastener is stainless steel.