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I found that a few of the bulbs for my kitchen under counter lights had burned out. A quick search for the number on the bulb "F8T5" on Amazon yielded quite a few options. I chose this one because it was the best combination of good reviews and good pricing. In fact, this 6-pack was about he price you would pay for a single or 2 pack at home depot. The bulbs arrived very well packaged and not damaged at all. I installed 2 of them 8 months ago and they are still going strong, this 6 pack should last me at least 5 years. A note about the color temperature: there's 2 options for this item cool (4100K) and warm (3000K). Cool is good for applications where you want to see very clearly like in the kitchen, warm is better for softer light like a bedroom or family room.
I use these bulbs for under the counter kitchen lighting but I ordered cool white and received warm white. Cool white should produce whiter light not the yellowish. So not sure if I received the wrong item or if the product is inferior.