Fig. shows the final design of these components. Fig. represents the aluminum-cooler holder, which enables the circulating cooling water to go through the rod. Therefore, it will act as a heat sink to remove the heat generated by the LED irradiation. Fig. represents the tube guide and holder that fit all the test tubes with NS 14/23 standard. This tube holder design is also replaceable depending on the tube used. Fig. represents the customized adapters for building the magnetic stirring system, which should fit with the axial stirring fans incorporated into the system. Fig. is the base for the magnetic stirring system, whose height is adjustable according to the position of the LED used. Similarly, it is important to note that all these parameters should correspond to the design of the photoreactor that researchers want to build by themselves. Different from placing the magnets horizontally in the literature , they are installed vertically and inserted into the groove of the stirrer base and top support. A step-by-step assembly is as follows: