Convert your existing fluorescent fixture to LED technology with the Feit Electric T4815/840/AB/LED/10 4-foot LED Hybrid linear tube lamp. This dual-mode type AB LED linear tube works as a direct plug-and-play replacement for fluorescent tubes, or you can bypass the ballast on your fixture in the case of ballast failure to continue using the lamp. As a plug-and-play tube, it replaces 32-watt T8 lamps. By bypassing the ballast, it will replace 32-watt T8 tubes or 34/40-watt T12 lamps. Its 4100K Cool White light is ideal for staying productive in offices, garages, and warehouse settings. This 15-watt LED produces 1850 lumens - up to 53% less energy than an equivalent fluorescent lamp. Enjoy flicker-free light with instant-on to full brightness. Feit Electric shatter-resistant fluorescent replacement lamps have an average life of 50,000 hours / 45 years, are RoHS compliant, and are 100% mercury-free. Choose a dependable LED tube with flexible installation that allows for using existing ballast or bypassing the ballast with a simple fixture rewiring.