Wesome Lighting 21-Inch F13T5/CW LED Replacement Bulbs — 4100K Cool White, 9W, 4-Pack

Upgrade to efficient 21-inch LED tubes

Refresh your spaces with Wesome Lighting 21 inch F13T5/CW LED replacement bulbs. These 9W tubes deliver a bright 4100K cool white that keeps tasks crisp without the heat of traditional fluorescents. With about 950 lumens and a generous CRI of 80+, colors stay more natural under the lamp, making kitchens, offices, and cabinets easier to work in. The bulbs are designed to slip into your current electronic ballast and replace fluorescent tubes without changing fixtures, preserving your existing layout and style.

Key specs at a glance

• Length: 21 inches
• Wattage: 9 Watts
• CCT: 4100K cool white
• Lumens: 950
• CRI: 80+
• Base: G5 bi-pin

Installation is straightforward because the bulbs use a bi-pin base and two pins at each end. Align, insert, and twist into place without rewiring. The light illuminates spaces quickly with a neutral white tone that complements a wide range of decor.

What to know before you install

• Ensure your ballast is functional at both ends before installation
• Designed to work with existing electronic ballast systems
• No ballast replacement required in most setups

Beyond ease of install, these LED replacements offer energy and upkeep advantages. You may experience lower heat output and longer service life—up to about 30,000 hours—compared with traditional fluorescent tubes. With CRI 80+, colors appear more natural, which helps when assessing task lighting, textures, and materials under the lamp. This makes the bulbs well suited for offices, kitchens, counters, and cabinets, delivering a versatile upgrade that can reduce maintenance needs while matching existing fixtures.

In practice, you can pair these bulbs with under-cabinet lighting for a crisp work surface, outfit a pantry or laundry area with steady illumination, or refresh a showroom counter where accurate color rendering is valuable. The 4-pack provides consistent brightness and color across multiple fixtures, helping you plan a cohesive upgrade across your space.

Getting started is simple: check that your ballast is healthy at both ends, insert the LED tubes, and enjoy the refreshed look of your space with minimal disruption.