Sylvania 18" T8 Preheat Fluorescent Linear Tube Lamp, 15W, Premium Cool White Phosphor, 4100K, 70 CRI - 1 Pack (21603)

This item worked fine for me. It installed easily and provided a pleasant light just like the previous ones I have installed in my bathroom mirror fixture thru the years.

Bought 2 because the price was fantastic. Oops, it'll be a while before I even need to use the second.

I have trouble seeing in low light, so my landlord installed under cabinet lights for me in my kitchen so I could prepare food and wash dishes more easily. The lights he put in were great, but still kind of dim, so depending on where I was or what angle I was using, it was still sometimes difficult and I would have to turn on all my kitchen lights. I bought this bulb when my over sink bulb blew. I went with this one, because Sylvania is a popular brand that I have heard of and I was hoping that would translate to a brighter bulb. I’ve never replaced a fluorescent bar light before. so I was wary of buying anything different than the F15T8 one that was in there before as I wasn’t able to find anything definitive online to tell the difference between wattage and length when determining what the “F” number indicated. I was very happy to find that this light is bright enough that I no longer need to turn on every light in my kitchen just to wash dishes or chop some veggies. I definitely recommend this bulb.

When I bought these under counter lights they came with dimmer yellow bulbs when they went out I replaced them with these they are great. I think one went out after about a year and a half of continual use to two years and then replaced it. I will keep purchasing when they go out. Fluorescent bulbs seem to go out more the more you use them years ago they used to last for 10 years don't know what's changed. Some people I did want to Note that they replace the bulb and say it doesn't work I believe maybe their ballast went bad They do sell ballasts for these cheap on Amazon two of them for probably the price of one bulb. But daylight bright which I think these are are great nice bright white.

Bought this when the Aqueon bulb I had in my Betta's fish tank went out, and I saw that Aqueon doesn't even make the same bulb I had any more, so tried this one, and it works just great.

I still have fixtures that use these fluorescent tubes. I thought about upgrading to LED, but that's quite the expense! My search for a reasonably priced replacement fluorescent tubes, found these. The pros: + Pretty good customer product reviews. + Surprisingly low price of $2.29 each, when I bought a bunch, with free Amazon shipping! + These "Premium" cool white, 4100 kelvin tubes enhance colors, not as cold as the regular cool white tubes. + These tubes are pretty bright at 900 lumen. + These "premium" tubes are CRI 70, which render colors better, compared to standard... utility rated tubes! The cons: - One of the tubes I installed in January is "dead" & it's February! Normally I get over a year of use before tubes fail! Closing remarks: ▪ I really like these Sylvania Premium tubes, but lasting less than 2 months is unacceptable! ▪ These are used in my kitchen as under cabinet lighting, so they do get power cycled a lot, so I don't expect more than a year of use. ▪ All our fluorescent fixtures have electronic ballasts, so it's not the tube filaments burning out. ▪ The tube that died showed no sign of blackness on the ends, which I normally see on failed tubes. Updates: ► 03-28-23 - no additional bulbs have failed, so I upped my product rating from 1 to 2 rating stars. ► 09-07-23 - I just had to replace a bulb after less than 9 months of service! The bulb still lights, but the brightness... light output is much less than the other installed bulbs? I decided to drop my product rating back down to 1 of 5 rating stars! ► 11-18-23 - Another tube is dead after 11 months of use! ► 04-09-24 - Yes, another failure & the price of these tubes used to cost $2.29, now over $15 each! Perhaps time to reconsider upgrading to LED light tubes?

This lamp bulb fit my very old desk lamp without a hitch and provides me with much more light than the old one that was on it's last legs. It was very easy to remove the old bulb and replace with this new one and what an EXCELLENT value this one is. Definitely recommended and with a 5 star rating.

At the time I purchased, these were the lowest price I could find for 18" florescent tubes. They are cooler than the warms being replaced in my kitchen, but still nice. Very crisp white and bright light without totally washing out colors. Nice that they are a name brand too (Sylvania) and not generic. I purchased three, all worked when tested.

One of the pins on the end of tube was bent during packaging or shipping but I managed to get it into the pin holder in the fixture and works fine.

Great luminosity and perfect replacement light

I was disappointed I put it in turned the switch and got no lights