QTL Information

Lighting designers and specifiers trust QTL when the details matter. For over 30 years, QTL (formerly Q-Tran) has been engineering architectural LED lighting solutions built to perform and built to spec. With manufacturing facilities in Milford, Connecticut, we have the coast-to-coast capacity to support architectural projects of any scale, anywhere in the country. Whether you're specifying a hospitality environment, a high-end residential build, or a complex commercial installation, QTL has the depth of product line and the technical expertise to support your vision from concept to completion. What sets us apart: 🔹 300+ product varieties — transformers, power supplies, linear LED, and extrusions for virtually any application 🔹 Spec-friendly solutions — our team works directly with designers and specifiers to find the right fit 🔹 American-made quality — proudly manufactured in the USA with rigorous standards for reliability and performance 🔹 30+ years of innovation — a trusted name in architectural lighting since 1993 We don't just make lighting components, we build long-term partnerships with the professionals who depend on them. Ready to spec QTL on your next project? Connect with us or visit qtl.lighting