Superior Quartz 6818A4C UV Curing Bulb - CureUV Brand Base_Barrier Black Valox Base This replacement germicidal bulb has

This replacement germicidal bulb has a 2 pin G23 base on a single end that is used for pond water clarification

Drawing of Replacement UVC Bulb Item # 510816 (PDF)

at 2 feet you do not have 5 mw/cm2 but probably 1 or 2 mw/cm2

Dichroic Reflector Set for UVT Part # U1003392-518 UV Curing Lamp Bulb

Arc Length: 609 mm

Superior Quartz 6818A4C UV Curing Bulb - CureUV Brand Base_Barrier Black Valox Base This replacement germicidal bulb hasGuaranteed 100% Compatible Replacement Ultraviolet (UV) Lamp Mercury Wavelength 22. 75 Inch Total Length (end to end) Our CureUV Brand Replacement UV Curing Bulb for Superior Quartz 6818A4C is a high quality treatment lamp that features high actinic output and longer service life. The selected HG spectral output guarantees short exposure times and the best dot to dot quality. The high performance lamp is 578 mm long and has a factory warranty of 600