GE Color Select Direct Wire and Replacement T8 LED tubes replace 48-inch T8—1-inch diameter fluorescent bulbs using the existing fixture. It's dual application can be used to be a direct replacement using the existing T8 electronic ballast or it can wire directly to line voltage with no ballast required. Use the toggle switch to choose between Cool White (4000K), Sunshine (5000K), and Daylight (6500K) to find the perfect color temperature for any space. Why make the switch to LED? GE LED tubes last 50,000 hours based on six hours use per day, so you’ll replace less often. They use less energy than a 32-Watt T8 fluorescent tube with nearly the same light output helping you save money on energy. And, they’re mercury free.