Coralife - 5W Pond UV Light Bulb for Germicidal Water Treatment 7514A30C216 It is suggested that you

It is suggested that you annually replace the light bulb for better efficiency and germ-controlling ability

BioLogic: BIO-3

Output uW/cm^2 @ 1m: 78

the "Profiler" gives you all of the functionality of the standard unit but adds in computer connectivity for further analysis

Coralife - 5W Pond UV Light Bulb for Germicidal Water Treatment 7514A30C216 It is suggested that youGuaranteed Replacement Ultraviolet (UV) Bulb 5 Watts 4 Inch Length Lamp Worry Free Performance for 1 Year Product Overview: Specifications: Compatible With: Wattage: 5W Length: 4 inches Base: G23 Coralife 5W UV Light Bulb is 5 watts and 100% compatible with germicidal OEM Water sterilization filters, UV sanitizers and water purifiers. This lamp also uses UV C light to inactivate and kill bacteria, molds, protozoa, viruses and yeasts. This replacement