The boost-buck converter combines a boost converter and a buck converter in one, allowing it to increase or decrease voltage as needed. This is useful for LED lights that may require different voltages than the power source. By operating in continuous conduction mode, the converter can maintain steady currents with minimal ripple, reducing the need for large capacitors. The converter also provides isolation, ensuring that a failure in the input won't affect the output. Overall, the boost-buck converter is an efficient solution for powering LED lights with varying voltage requirements.