Our 24V Ultraviolet lamp has been designed to clean the air as it passes through the evaporator coil and adjacent areas, thereby reducing air contamination. The 24VAC electronic power supply features voltage protection (IVP) to safeguard the A/C system from electrical overload. The package includes the UVC bulb, 24VAC ballast (includes a 6ft lamp cord with a plug for connection to a 110V outlet and a 5ft cord from the ballast to the transformer), and the magnetic bracket. This UVC light bulb emits 253.7 nm with 99% efficiency in a single pass and comes equipped with a magnetic bracket for easy installation, eliminating the need for drilling holes. EPA Est. No. 97544-CHN-1. This UV lamp is suitable for air conditioning HVAC systems up to 5 tons.Energy efficient UVC light bulb emits 253.7 nm with 99% efficiency in a single pass and comes equipped with a magnetic bracket for easy installation, eliminating the need for drilling holes. This UVC bulb technology has been used in hospitals for many years to maintain clean air and reduce the transmission of airborne diseases.