54 watt, mid color, high output Fluorescent Tube enhances both cool and white colors. This tri-phosphor, high-efficiency, slim fluorescent T5 tube offers superior colorimetric, photometric and lumen maintenance performance. Particularly suitable for use in the new low-profile recessed and suspended lighting fixtures and modular systems. Features high lamp efficacy with high-color rendering and energy savings up to 25 percent compared to T8 tubes in appropriate lighting fixtures. 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 and long-life performance. Optimized ambient operating temperature at 35 degree C (max lumen output) allows compact lighting fixture designs. Reduced storage volume and transportation costs. Fluorescent T5 tube offers an average rated life of up to 20,000 hours. Size is 48" long x 5/8" diameter.