Made the Right Way the Good Way

Reimagined Incandescent Glow

The GoodBulb F40LTT Long Twin Tube brings clean, balanced illumination with a 3500 Kelvin Neutral White glow engineered to enhance productivity and visual comfort. Designed for large-format fixtures and architectural luminaires, this 22.19-inch lamp delivers smooth, uniform light distribution that transforms offices, hallways, schools, retail environments, and utility spaces with clarity and visual harmony. Its long twin-tube profile ensures efficient, shadow-free lighting that elevates every environment.

Power and Versatility

Consuming only 40 watts, this Long Twin Tube CFL produces an impressive 3300 lumens, supplying abundant brightness while minimizing energy consumption. Its 2G11 4-pin base ensures compatibility with a wide range of fixtures, and its design supports dimmable operation when paired with electronic ballasts. The F40LTT is built for both new installations and retrofit projects where performance, longevity, and efficiency matter. Ideal for ceiling troffers, commercial pendants, cove lighting, signage, and architectural applications.

For the Love of Color

Featuring a High CRI of 82, the F40LTT lamp ensures that colors remain natural, accurate, and true to life. The balanced 3500K spectrum delivers a warm-yet-neutral tone that enhances visual focus while maintaining comfortable ambience. This lamp brings out the nuanced details in fabrics, surfaces, and architectural finishes, upgrading the visual quality of any space illuminated by it.

Rough Service Fluorescent

Engineered with durable phosphors, optimized cathodes, and a robust long-tube construction, this lamp withstands vibration, temperature variations, and heavy daily operation. The extended 12,000-hour lifetime ensures dependable performance with reduced maintenance demands. Whether installed in commercial corridors or nonstop office environments, the F40LTT stands strong in demanding applications.

Effortless Dimming

Designed for smooth, responsive dimming when paired with compatible electronic ballasts, this lamp enables flexible lighting control. Transition effortlessly from full-output task lighting to soft, ambient glow without flicker or color shift. Ideal for conference rooms, multi-purpose spaces, and facilities that require adaptable lighting.

Built to Last

Every GoodBulb Long Twin Tube lamp is constructed from quality components for stable, long-term performance. Superior cathode coatings, efficient gas mixtures, and precision-engineered tubes ensure consistent light output across the entire service life. Built with integrity and optimized for longevity, this lamp reduces replacement cycles and maintenance disruptions.

Guardian of Prosperity

By replacing outdated fluorescent tubes with this efficient 40-watt high-output lamp, businesses can reduce energy costs, maintenance time, and material waste. Lower utility bills and longer lifecycle performance translate into meaningful long-term operational savings. The F40LTT supports sustainability goals while delivering excellent light quality.

Xtreme Life Guarantee

Rated for 12,000 hours, this lamp lasts significantly longer than comparable products. Backed by GoodBulb’s commitment to quality and longevity, the F40LTT ensures consistent light, reliability, and performance throughout its service life when used with compatible electronic ballasts.

Impactful Lighting

Lighting impacts comfort, productivity, and environmental responsibility. The GoodBulb F40LTT Long Twin Tube reduces waste, minimizes replacement frequency, and delivers high-quality illumination that supports both people and the planet. As part of a mission-driven lighting standard, GoodBulb products illuminate spaces while advancing environmental stewardship.