Diffusioneshop.com offers power supplies, transformers, ballasts, control units for RGB and white LED strips, occupancy sensors and brightness for LED strips . The power supplies, voltage 12v / 24v / 48v are suitable for LED strips and LED modules controlled DC voltage, the power supplies in constant and variable voltages are suitable for modules and current controlled LED chip (350 mA, 500 mA, 700 mA, 1000 mA). To choose the right power supply voltage is sufficient to check the working voltage of the module or installed LED strip / s and check the total power consumption. For constant current power supplies and sufficient to verify the quantity of modules or LED chips installed in series and choosing the right controller (for example, whereas you have installed 4 350mA 1w LED modules with a single supply voltage of 3.2 / 3.4 V work You will have to choose a power supply with constant current output 350 mA and working voltage 3.4 x 4 = 13.6 V). Our reference brand is Mean well . Meanwell is the world's number 1 leader in power supplies and electronics for what regards quality production quantity and choice of models in the catalog.