Description
The Excelight EL1129L UV Lamp is a genuine replacement ultraviolet lamp designed for use in compatible Excelight UV water disinfection systems. Engineered to deliver consistent UV output, this lamp helps inactivate bacteria, viruses, and cysts, ensuring safe, reliable water for residential and light commercial applications.
Regular replacement of the UV lamp is essential to maintain proper UV dose and system performance.
Features & Benefits
- Genuine Excelight Replacement Lamp, Built to original equipment specifications for proper fit and reliable operation.
- Consistent UV Output, Maintains effective ultraviolet intensity to neutralize harmful microorganisms.
- Maintains Disinfection Performance, Ensures reliable water treatment and proper UV dose.
- Easy Installation, Designed for quick, hassle-free replacement during routine maintenance.
- Long-Lasting Reliability, Built for consistent performance over its rated operating life.
Compatible Quartz Sleeve
- Excelight QS-1129 UV Quartz Sleeve
- Protects the lamp from direct water contact while allowing maximum UV light transmission.
- Inspect and clean the sleeve regularly; replace if cracked, cloudy, or damaged.
Compatible UV Systems
The EL1129L UV Lamp is compatible with the following Excelight UV systems:
- Excelight EL1129
- Excelight EL1129H
- Excelight EL1129M
- Other Excelight systems specifying EL1129L lamp / QS-1129 quartz sleeve
Always confirm your UV system model before ordering to ensure proper compatibility.
Maintenance & Replacement
- UV Lamp: Replace every 12 months
- Quartz Sleeve: Inspect and clean annually; replace if clarity cannot be restored
Proper maintenance ensures consistent UV output and reliable water disinfection.
Applications
- Residential UV water treatment systems
- Cottages and seasonal properties
- Light commercial UV installations
- Routine UV system maintenance and servicing

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