GE F40D/EX is a 40W T12 linear fluorescent lamp designed to provide daylight illumination for commercial, industrial and general lighting applications. The lamp features a 48-inch straight soda-lime glass tube with a G13 medium bi-pin base. It produces a 6500K Daylight appearance, approximately 2,550 initial lumens and a CRI of 75, with a rated service life of approximately 20,000 hours. The lamp is designed for operation with a compatible fluorescent ballast.