Compatible with Instant Start ballasts, T8 DIR LED Tubes include T8 17W 4FT, T8 15W 4FT, and T8 10W 2FT models that directly replace traditional fluorescent tubes. Units combine micro-designed driver and compact light engine to create light emitting area of 275°. Integrated driver is stored discreetly within tube end cap to eliminate dark spots. With glass body, tubes diffuse heat and light more evenly than plastic tubes. All versions come in frosted finish with CCT of 4,000 K and 5,000 K.