Genuine Ster-L-Ray brand of germicidal ultraviolet lamp for the Ultimate U4 and U7 Ultraviolet Water Purifier. This Made in the USA quality lamp produces short wave radiation lethal to bacteria, viruses and other micro-organisms present in water. Keeps your water safe for a full year.
- No shelf life
- 10,000 hours of rated effective life
- Manufactured in fused quartz material
- Easy replacement