Sylvania DULUX 13W Single Compact Fluorescent Lamp, GX23 2-Pin Base, 800 LMS, Frosted Glass, 2700K, Soft White - 1 Pack (21136)

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.

My desk lamp is back working. Bright white is way better than the soft white I use to have. High quality at a great price.

Works exactly as advertised. Very convenient to buy from Amazon rather than from a local plumbing and electrical store and cheaper than them too… I checked

These bulbs will flicker and buzz for a second or two when first switched on. After that, they work fine. The original Panasonic bulbs that were replaced never did either of those things and have worked for over a decade.

Fit perfectly. Had the two plastic grooves on the edge I needed and was missing in the last one I tried ti buy (from someone else) plugged in and lights up! Can see in my backyard at night again.

Good product good price

The item fit well in the old bathroom fan. Like all fluorescent lights, it flashes when first turned on. No big deal, the old one did the same thing and it was a different manufacturer.

Worked great when I installed it. A week or so later and I noticed it was so dim that it was useless. Amazon won’t take it back and replace it. They want me to contact the manufacturer. They should stand up, take it back, send me a replacement and send this junk back to the manufacturer so I don’t have to deal with anyone else.

perfect fit for an old lamp

Cumple con la especulación correctamente

Lo que esperaba

Una vez que enciende, se mantiene constante la luz

please NOTE that the product Description is incorrect. the base is GX23 ...NOT G23 . I decided to place the order according to the photo given on the web page. Luckily, this bulb fit my fixture (which requires GX23), in spite of the wrong information provided. G23 bases will not fit into fixtures made for GX23 bases and vice versa. Otherwise , the order arrived the next day -- fast delivery and a good quality product by Sylvania.