UV energy for industrial applications has traditionally been generated by arc or microwave technology. UV generated by arc or microwave sources is broad and emitted across the ultraviolet, visible and infrared spectrum. UV LEDs continue to advance and improve. The technology, power output levels, spectral choices available and form factor of the equipment have and will continue to change rapidly. Formulators continue to develop products that can work with the relatively narrowband UV LEDs. UV LEDs can be a viable alternative, or in some cases, a primary choice for UV curing applications.