Dimmable drivers and transformers for LED lighting. There are constant voltage drivers with 12 and 24 volts for LED strips and constant current drivers for fixtures and panels that require a fixed current.
When choosing, pay attention to how the driver is dimmed. A TRIAC driver works with a standard LED dimmer on the wall. A 1-10V driver requires a separate control line and a 1-10V dimmer. You make this decision before the wiring is installed.