Formed in Boston in 1901, Sylvania produced the world’s first halogen and retrofit LED GU10 bulbs. Sylvania LED, CFL, fluorescent, and halogen bulbs come in candle, capsule, pear, reflector, GLS, stick, and tube shapes, with base types that include E27 and B22. Sylvania light bulbs are known for their high quality. Select Sylvania lighting products are dimmable.