Made the Right Way the Good Way

Reimagined Incandescent Glow

The F21T5/841 delivers crisp, clean 4100 Kelvin Cool White illumination designed to bring clarity, focus, and visual comfort to any environment. This high-performance T5 fluorescent lamp produces a balanced neutral-white tone ideal for task lighting, commercial retail environments, classrooms, workshops, and office spaces. Its smooth white finish ensures even luminance across the entire 34-inch tube for a consistent, modern aesthetic.

Power and Versatility

Engineered for efficiency, this 21-watt T5 lamp produces an impressive 2100 lumens—achieving 100 lumens per watt for outstanding energy savings in linear fluorescent systems. Optimized for G5 Mini Bi-Pin fixtures, the F21T5/841 is compatible with a wide range of commercial and residential applications. From troffers and under-cabinet fixtures to industrial workstations, this lamp delivers immediate, flicker-free illumination you can trust.

For the Love of Color

An elevated 85 CRI brings enhanced color accuracy to any space, allowing objects, materials, and finishes to appear more vivid and true to life. The 4100K Cool White spectrum supports visual acuity, making it ideal for productivity, reading, precision work, and retail displays where clarity matters.

Rough Service Performance

Built for consistent operation, this T5 lamp maintains stable lumen output throughout its lifespan with reduced depreciation compared to older fluorescent technologies. The durable glass housing and precision-manufactured electrodes provide reliable operation across a variety of environmental conditions, ensuring quality light day after day.

Effortless Operation

Designed for instant start and rapid re-strike, the F21T5/841 integrates seamlessly into existing T5 electronic ballast systems. Operates without buzzing, strobing, or warm-up delay, delivering dependable performance from the moment the switch is flipped.

Built to Last

With a 36,000-hour rated life, this long-life T5 lamp reduces maintenance cycles, labor costs, and replacement frequency. Precision-engineered cathodes and premium phosphors ensure long-term brightness retention, outperforming standard fluorescent tubes built with lower-grade components.

Guardian of Prosperity

At just 21 watts per lamp, upgrading or maintaining T5 systems can significantly reduce energy costs—especially in facilities operating dozens or hundreds of fixtures. Lower wattage means reduced heat output, extending fixture and ballast longevity while helping reduce cooling loads. Smart energy decisions today lead to compounding long-term savings.

Xtreme Life Guarantee

Built with high-quality materials for lasting performance, this T5 lamp offers dependable, long-life illumination suited for demanding commercial schedules. Designed to operate up to 36,000 hours under normal conditions, minimizing downtime and replacement cycles for years to come.

Impactful Lighting

Lighting is more than lumens—it impacts productivity, comfort, and environmental responsibility. The F21T5/841 reduces energy waste, extends fixture life, and lowers environmental impact. Thoughtful lighting choices conserve resources and promote sustainable operations across commercial, industrial, and residential spaces.