🟣Premium Replacement for Delta E-31 / ES-31 – Engineered as a perfect fit for Delta UV systems using models 70-18405, 2190-001, and 368012. 🟣Powerful Output (254nm) – High-Output (HO) Preheat Design – Ensures maximum UV intensity and longer lifespan in high-demand systems. 🟣Optical-Grade Quartz Glass – Enhances UV transmission and maintains consistent strength. 🟣Long Service Life – Rated for up to 12,000 hours, reducing maintenance and ensuring dependable operation. 🟣EPA Certified Manufacturing – Produced under EPA Establishment No. 96823-PA-1, guaranteeing safe and consistent quality. The LSE Lighting Delta UV E-31 / ES-31 Replacement Lamp (70-18405) is a premium-grade ultraviolet bulb engineered for high-performance and system compatibility. Designed as a direct equivalent to Delta Ultraviolet models E-31 and ES-31, this 30-watt high-output (HO) lamp delivers powerful, consistent UV-C output at 254 nanometers—the ideal wavelength for water systems. Manufactured in an EPA Registered Facility (No. 96823-PA-1) and designed in the USA, this lamp guarantees precision fit, superior efficiency, and long operational life. Constructed with optical-grade quartz glass, it ensures maximum UV transmission and reliable performance over 12,000 hours of continuous use. Whether used in residential pools, spas, or water systems, LSE Lighting lamps are trusted by professionals for their accuracy, durability, and cost-efficient performance. Technical Specifications Brand LSE Lighting Model / Part Number E-31 / ES-31 Equivalent (70-18405) EPA Registration EPA Est. No. 96823-PA-1 Lamp Type Ultraviolet UV Wavelength 254nm (Non-Ozone Producing) Wattage 30 Watts Length 14 inches (357mm) Base Type T5 4-Pin Single Ended Operating Current 800mA Output High Output (HO) Preheat Glass Material Optical-Grade Quartz Tube Rated Life 12,000 Hours Design Origin Designed in USA Warranty 1-Year Limited Warranty Compatibility This LSE Lighting UV Replacement Lamp is 100% compatible with the following Delta Ultraviolet systems and lamps: Delta Ultraviolet Models: E-31, ES-31 Part Numbers Replaced: 70-18405, 2190-001, 368012 Compatible Systems Include: Delta UV, Delta Ultraviolet Water, and related high-output UV-C units. Performance Advantages High Efficiency – Delivers 254nm UV-C light for effective performance. High-Output HO Lamp Design – Provides powerful UV intensity for larger or commercial systems. Durable Quartz Construction – Ensures consistent UV transmission and extended lamp longevity. Cost-Effective Operation – Long 12,000-hour life reduces downtime and replacement frequency. Safe & Eco-Friendly – Provides clean water and air without chemicals or ozone. Installation & Maintenance Turn Off Power: Disconnect the system before installation or maintenance. Handle with Care: Use clean gloves or a lint-free cloth to avoid fingerprints on the quartz glass. Install Properly: Align the T5 4-pin base securely in the socket before powering on. Avoid UV Exposure: Never look directly at an illuminated UV-C lamp — it can harm eyes and skin. Replace Annually: Replace every 12 months or 12,000 hours for optimal UV output and safety. Package Includes (1) LSE Lighting Delta UV E-31 / ES-31 Equivalent 30W UV Lamp Why Choose LSE Lighting Designed in the USA – Engineered for precision fit and maximum UV performance. EPA Registered Manufacturing (No. 96823-PA-1) – Ensures consistent quality and environmental safety. Trusted by Professionals Worldwide – Proven performance across water, air, and surface systems. High Output UV-C Intensity – Meets and exceeds OEM performance standards. 1-Year Warranty & Support – Backed by dependable customer service and Canadian support. Safety Information UV-C Radiation Warning: Do not operate the lamp outside of its protective housing. Handling Instructions: Always wear gloves when handling quartz glass. Environmental Notice: Contains a trace amount of mercury (Hg). Dispose or recycle per local environmental regulations.