Sylvania 21119 Compact Fluorescent 2 Pin Double Tube 3000K, 13-watt

Thanks to other reviews on this lightbulb I made sure to check the grooves.

This one cost a bit more than the chinese replica bulbs, though it seems like the construction is better and I believe that the longevity will also be better. it is as bright as I expect, comes on fast enough and I imagine that it should last many years as it rated at 10000 hours. the last import copy bulb i bought was cheaper, and it only lasted a couple years at best with very little use.

Just what we needed to fix our light in the bathroom. After one ordered was wrong this was the right one. Easy exchange from Amazon thank you. Why fight going to the stores anymore. Price is always better here.

It fit as expected

My trouble light gets banged around a lot as I'd suspect most do, being on the end of a length of electrical cord, such that the bulb didn't light. Had to figure out how to dismantle it, but once apart there was socket for this flourescent bulb so just plugged it in, reassembled case, then it was back to working. Don't know how long these last...they should add catergory "I don't know (yet)" for questions like this, since I just bought it, how should I know how long it will last? Premature question...if you really want to know, ask me again or let me update this review later on when it burns out.

I knew I needed a 13 watt tube because it was clearly stated on the base of the tube I was replacing. But I know from past experience that isn't always the case. So I confirmed this was the right tube by viewing and resizing the picture on a tablet until it matched up to the tube that was being replaced. Here are the measurements as close as I can tell:The length of the two u-shaped tubes is 2 15/16" from the ceramic base to the top of the tube. The rounded square, ceramic base measures 1 5/16" across by about 3/4" deep (including the smaller portion of the base to which the prongs are attached). The brass prongs are 1/4" long, and the plastic, pronged fitting at the bottom is 7/8" long by about 1/2" wide.This tube replaced a Sylvania Dulux D 13W CF13DD/827 that had itself probably been a replacement tube. It was purchased for a solitary recessed fixture in our kitchen. (We also have five bright, recessed LEDs when we need lots of light, and a 14" Solatube with nightlight that provides sufficient daylight, and a small amount of night light when properly charged by the sun). The tube I purchased is a 3000k because I don't need a lot of light from that fixture. If you need more light then you might want to go higher.The new tube fit into the fixture quite firmly with a only a small amount of persuasion. It flickers for a brief second when turned on, then stays on and provides enough light for a quick visit to the kitchen when the night light is too dim and the five LEDs are too much. It makes a fine replacement for the previous tube.

Worked very well!

These bulbs flicker before coming on I don't know if this is how these bulbs work or if they are going out. Hard to find out in town wish I could exchange

The media could not be loaded. Una vez que enciende, se mantiene constante la luz

Good quality and price. Fast delivery

Drop in replacement for retractable trouble light in garage. Works well. Clean white light (bit harsh, but good for illuminating engine bays etc.

Love Martini Ts

was great no problems