Keystone Technologies KTEB-228HE-UV-PS-SL 1 or 2-Lamp T5 High Efficiency Ballast

The Keystone KTEB-228HE-UV-PS-SL is a high-efficiency electronic ballast engineered for professional T5 fluorescent lighting systems. This durable 1 or 2-lamp ballast supports F28T5, F21T5, and F14T5 tubes with universal 120–277V multi-voltage compatibility, ideal for retrofit and new installations across North American facilities. Built for performance and longevity, this ballast delivers UL listing, FCC Part 18 Class B compliance, and a comprehensive 5-year warranty. Advanced features include program start ignition, parallel lamp operation, end-of-lamp-life protection, and high power factor efficiency to reduce energy consumption. Cold-start rated to 0°F, operates with minimal acoustic noise (Sound Rated A), and maintains a maximum case temperature of 167°F for safe, reliable operation. Perfect for commercial facilities, retail environments, and residential upgrades seeking energy-efficient lighting with extended lamp life and minimal maintenance.