You need to bypass the ballast and use non-shunted tombstones for our Type B T8 LED Tubes to work properly.Check out our blog for more details about removing the ballast and on What Type of Socket You Need (Shunted vs. Non-Shunted Tombstones). In a separate blog, you can learn more about the Advantages of Direct Wire T8 LED Tubes and how Type B T8 LEDs offer many benefits when compared to a fluorescent bulb.