1. Carefully remove the fan blades with tweezers and smooth the perimeter with a flat file. High power LED will generate lots of heat from illumination, which in turn may make itself burnout. Therefore, a heat sink is required to dissipate the heat effect and guarantee the LED work properly. An aluminum rod is a good choice to act as an effective cooler since a constant surface temperature can be maintained by flowing the cooling water through the center of its shaft. A step-by-step assembly is as follows: