... 28leds,aluminum base PCB 3.with good thermal conductivity led pcb 4.Size:132X75mm, thickness 2.0mm Packaging ... ,aluminum base PCB 3.with good thermal conductivity led pcb 4.Size:132x75mm, thickness 2.0mmFeatures: ... AlloyCopper Thickness:1ozWidely Application:LED lighting, street lighting, lawn lamp, fluorescent lamp, miner's lamp, stage lamp, wall lamp ... . 28W SINGLE SIDE ALUMINUM PCB FOR LED STREET LIGHT