Circle (6 Pack) F13T5/CW 4100K Cool White T5 Under-Cabinet Light Bulbs, 21in, 13W

Smart, efficient lighting for every counter and cabinet

Upgrade your space with Circle F13T5/CW bulbs. Each 13W tube delivers a crisp 4100K cool white glow that enhances visibility for daily tasks without harsh glare. At 21 inches long, these linear bulbs fit a range of under-counter fixtures and cabinetry, offering a slim profile that blends with your decor while delivering steady, even light.

Packaged as a 6-pack, you gain value and convenience for multiple locations. Each bulb averages about 20,000 hours of use, translating to fewer replacements and consistent brightness over time. Across the pack, you could experience up to roughly 120,000 hours of light, a practical option for spaces that rely on steady illumination.

Designed for ease, the bulbs feature two-pin ends for quick installation: simply insert, twist to seat, and you’re ready to brighten. The set ships with secure packaging to minimize breakage, so you receive your bulbs in good condition and ready to install.

• Low-wattage operation with bright, clear illumination for daily tasks
• Long lifespan reduces replacement frequency and maintenance time
• Includes a value-packed 6-pack for multiple fixtures or future replacements
• Two-pin end design enables quick, tool-free installation
• Versatile use across under-counter kitchens, RVs, patios, marine cabinetry, and more

These bulbs are a flexible lighting option for spaces that benefit from neutral, reliable light. While results can vary by fixture and usage, many users appreciate the combination of efficiency, longevity, and straightforward installation that Circle provides.

Installation, compatibility, and practical uses

With two pins at each end, these tubes are designed for simple replacement in compatible fixtures. The 21-inch length makes them a good fit for many under-counter and cabinetry setups, and their cool white tone helps colors and textures appear true-to-life in everyday tasks.