Konideke 18-Inch T8 Fluorescent Tubes F15T8 4100K Cool White — 6-Pack, 15W Long-Life

If you need bright, neutral cool-white lighting for garages, offices, kitchens, or under-cabinet fixtures, these 18" T8 tubes deliver long run time and broad compatibility with existing T8 sockets and ballasts. Each tube measures 18 inches long, has a T8 (1-inch) diameter, and produces a crisp 4100K color temperature that balances warmth and clarity without being harsh. This listing contains six replacement bulbs packaged together for multiple fixtures or multi-bulb arrays.

Will these bulbs fit my fixture and ballast?

These Konideke tubes are built to the standard T8 form factor with a G13 bi-pin base, so they fit fixtures intended for 18" T8 lamps. They work with many existing compatible ballasts, but nonfunctional or incompatible ballasts may prevent operation.

• Specs: 18 inches overall length, T8 (1" diameter), G13 base.
• Wattage: 15W nominal (not 17W).
• Color: 4100K cool white (F15T8/CW).
• Check: verify fixture is rated for 18" T8 tubes before purchasing.

How bright and long-lasting are these Konideke tubes?

Expect steady, neutral cool-white illumination suitable for task and utility lighting; the bulbs are engineered for an average life of around 8,000 hours under typical conditions. Brightness and lifetime will depend on how frequently the bulbs are switched and the health of the fixture's ballast.

• Average lifetime: approximately 8,000 hours.
• Color rendering: neutral cool white (4100K) for clear visibility.
• Use cases: garages, offices, kitchens, workshops, under-cabinet strips.

Are there any installation caveats or compatibility warnings?

Installation is straightforward for fixtures that accept T8 tubes, but a defective or incompatible ballast can prevent the lamp from powering up. If a bulb does not light, test with a known-good fixture or consult customer support for troubleshooting or replacement.

• Do not assume compatibility with T12 (1.5" diameter) fixtures—T8 tubes differ physically and electrically.
• Confirm overall length is 18"; these are not 24" replacements.
• If bulbs fail to work due to a defective ballast, contact support for refund guidance.

Who is this for?

These Konideke 18" F15T8/CW tubes are aimed at homeowners, contractors, and facilities managers who need reliable, neutral cool-white lighting in multiple fixtures or want a six-pack for replacements. They suit anyone replacing worn-out 18" T8 lamps in garages, commercial offices, kitchens, utility rooms, or workbenches—provided the fixtures accept T8 tubes and have compatible ballasts. Choose this pack when you want consistent color temperature across several fixtures and a straightforward swap-in replacement for existing T8 setups.