Thomas Research Products offers a very broad line of LED drivers, providing a wide range of choices. Different product lines offer different features and designs. However, all product lines include both constant-current and constant-voltage driver types. LED series dimming constant-current drivers typically offer a wider range of dimming than TRC dimming constant-current drivers. However, one advantage the TRC three wire dimming drivers offer is that they can be utilized with 2-wire dimming systems as well as with potentiometer dimming systems.  Note that LED drivers generally do not dim to 0%. This means that they can not be turned off by simply turning the dimmer down—the driver will still be running.