10 / Carton. T8 LED tube bulb illuminates rooms with 1,800 lumens of natural white light using just 12 watts of energy. Highly efficient, LED bulb delivers long-lasting performance for up to 50,000 hours. Easy-to-use design allows simple use with Instant Start and Rapid Start ballasts with no rewiring required. Nondimmable bulb also features a medium bi-pin base and 82 CRI.