Continuous Wave (CW) and Pusle Width Modulation (PWM) are two methods for controlling current in UV LED light sources. This paper discusses the differences between the two technologies, the advantages of each, and their respective applications.
Zhou, Rui, (2020). Continuous Wave (CW) and Pulse Width Modulation (PWM) UV LED Systems: Technical Characteristics, Advantages and Applications. RadTech 2020 Conference Paper.