Satco HyGrade™ High performance circline 22-Watt T5 2GX13 base circline fluorescent lamp offers 1900 initial Lumens and 1900 mean Lumens for bright and crisp light output. It has color rendering index of 82. Lamp with 3500K color temperature rating radiates neutral white light to the surrounding. Lamp measures 9-Inch x 0.63-Inch Dia. Lamp comes with average life of 12000 hours. Lamp is TCLP and RoHS compliant.