This point-of-use system allows for simple installation and operation due to its high output lamp and compact reactor. The reactor is an axial flow design with superior hydraulics, compact design and 3/4" (D4 Plus) and 1" (E4 and F4 Plus) MNPT connections. The controller is a simple plug in device connecting to the lamp with a safety cap. Controller offers indicator LED's as well audible alarms that can be muted if need be. System comes equipped with a lamp/sleeve assembly which has the two parts assembled together as one piece for ease of handling.