Tri-phosphor, high-efficiency, slim fluorescent T5 tube offers superior colorimetric, photometric & lumen maintenance performance. Particularly suitable for use in the new low-profile recessed & suspended luminaires & modular systems. 54-watt tube features high lamp efficacy with up to 104 lm / W, high-color rendering (85 CRI) & energy savings up to 25 percent compared to T8 tubes in appropriate luminaires. Luxline Plus tri-phosphor technology provides almost constant lumen-maintenance throughout the entire life of the lamp. Designed for electronic ballast operation only, giving greater efficiency, improved starting & long-life performance. Optimized ambient operating temperature at 35 degree C (max lumen output) allows compact luminaire designs. Reduced storage volume & transportation costs. Fluorescent T5 offers an average rated life of up to 20,000 hours.