🟣Direct Compatibility – Designed as a 100% equivalent replacement for Neptune TRI8 / TRI-8 systems, cross referenced with 3000, 3020, and 3030 models. 🟣Effective UV-C Output – Operates at the 254nm wavelength. 🟣Durable Quartz Glass Construction – Built with high-quality quartz glass, ensuring maximum UV transmission and long-term reliability. 🟣Precision 4-Pin Base – Features a 4-pin single-end base for a secure fit and easy installation. 🟣Efficient Performance – Rated at 22 watts with a 425mA operating current, engineered for standard-output UV performance. 🟣Extended Lamp Life – Provides up to 12,000 hours of service life; annual replacement recommended for peak performance. 🟣Professional Brand Quality – Proudly designed in the USA and manufactured in an EPA Registered Establishment (No. 96823-PA-1) by LSE Lighting. The LSE Lighting WTA4-450 UV Lamp is a premium-quality 22W replacement bulb designed for use with Neptune TRI8 and TRI-8 systems, with cross reference compatibility for 3000, 3020, and 3030 models. Operating at the 254nm UV-C wavelength. Its 450mm (17.71 inches) quartz glass tube ensures maximum ultraviolet transmittance and durability, while the 4-pin single-end base guarantees a secure and simple installation. Rated for 425mA standard output and built for 12,000 hours of service life, this lamp combines performance and efficiency for long-term reliability. For best results, it is recommended to replace the lamp annually. As part of the LSE Lighting professional ultraviolet product line, the WTA4-450 is proudly designed in the USA and manufactured in an EPA Registered Facility (No. 96823-PA-1), ensuring consistent quality, safety, and effectiveness. ⚠ Safety Warning: Ultraviolet UVC light can be harmful to eyes and skin. Always use protective eyewear and gloves when handling or installing UV lamps. What’s in the Box 1 × LSE Lighting WTA4-450 UV Lamp (22W, 18" / 450mm, 4-pin base, quartz glass, 254nm, 12,000 hr life) Technical Specifications Brand: LSE Lighting EPA Establishment Number: 96823-PA-1 Model: WTA4-450 Equivalent Compatibility: Neptune TRI8, TRI-8 (Cross Reference: 3000, 3020, 3030) Lamp Type: UV-C Lamp (254nm wavelength) Wattage: 22W Operating Current: 425mA Standard Output Length: 450mm (17.71 inches) Base Type: 4-pin single end Material: Quartz glass tube Rated Life: 12,000 hours (replace annually) Country of Origin: Designed in USA Legal & Compliance All lamps listed are LSE Lighting brand UV products. We do not sell Neptune brand lamps. All Neptune brand names, trademarks, and models remain the property of their respective owners and are used only for compatibility and cross-reference purposes.