Specifications: F13T5/CW fluorescent bulbs, Length: 21 inch, Wattage: 13 Watts, CCT: 4100K cool white, lumens: 1000, CRI 80+, G5 bi-pin base Easy Installation: These linear fluorescent bulbs come with 2 pins at each end so that you can just pop it into the socket and twist it into place. Easy to install and immediately lights up your home Wide Application: These 21 inch T5 13 watts fluorescent light bulbs deliver a bright 1000 lumens output, making them ideal for a variety of settings. Perfect for offices, kitchens, counters, and cabinets, these bulbs provide ample and even illumination. Their high lumen output ensures that your workspace, kitchen, or any other area is well-lit, enhancing both functionality and aesthetics Long Lasting: T5 13W replacement bulbs, with an impressive 12000-hour lifetime, these bulbs offer an exceptionally long lifespan. This extended durability significantly reduces the frequency of replacements, providing you with a reliable and low-maintenance lighting solution Packaging Guarantee: If it's broken or doesn't work when you get the F13T5 fluorescent tube light bulbs, please contact us to get a replacement