LED lights and bulbs can have many different shapes, depending on the specific use, size, and size of the application, including retrofit bulbs, high bay lights, low bay lights, and emergency lights. Driving a string of LEDs is related to AC-DC and DC-DC conversion—using non-isolated, isolated, single-stage or multi-stage topology designs—must ensure high efficiency and reliability at a competitive cost point. We have a series of pulse width modulation (PWM) and power factor correction (PFC) controllers, power MOSFETs and diodes, and a comprehensive set of hardware evaluation and development tools, including reference designs, to help developers design efficient LED lighting solutions.