SmartLamp ultraviolet (UV) air treatment system, single bulb. Airborne germs can circulate and spread in the airflow of residential ductwork. High intensity energy from Honeywell's UV air treatment system has been proven to kill up to 87% of certain airborne bacteria passing by lamp in a single pass. SnapLamp™ features replacement lamp handle with detachable replacement bulb, UC18W or UC36W, to make replacement more economical. UV-C light kills airborne bacteria or surface mold. Continuously emits ultraviolet energy. UV lamp does not produce ozone. Sealed unit design prevents accidental installer and homeowner contact with voltage and with ultraviolet rays. Safe design prevents lamps from lighting unless the base is correctly mounted on the HVAC duct. Lamp light indicator to safely view the lamp operation. Power cord plugs into electrical outlet. Quick and easy bulb replacement. Easy lamp maintenance. Optional AIRWATCH™ Indicator can be installed to remind customers when to change bulb. To capture and minimize micro-organism pass-through in residential heating, ventilation and air conditioning systems, combine Ultraviolet System with high-efficiency air filtration system that includes an electronic air cleaner.