Built for harsh environments, these PLT LED-MR16-5.5-55K-E 5.5-watt dimmable MR16 LED light bulbs are thermally engineered to operate in enclosed fixtures. With a 5500K, stark white color temperature and a 45-degree flood beam angle, these MR16 retrofit lamps are perfect for track lighting and retail displays. A suitable replacement for 42-watt halogen bulbs, it features dimming capabilities from 100 to 5 percent with Lutron LED dimmers and most magnetic transformers. This lamp has a long life of 35,000 hours to minimize your replacement or maintenance costs. A 3-year factory warranty ensures that this LED MR16 light bulb will perform for years to come.