Sylvania 20668 Compact Fluorescent 4 Pin Double Tube 4100K, 18-watt

I needed to replace one that I previously bought on here three years ago. The quality is great and it was very easy to put in. For me this is a great value as they are hard to find. I got it yesterday and it was shipped very fast. Works just as intended, no flickering at all.

We have a Panasonic ceiling mounted bathroom light/night light/ fan/heater. This odd shaped light bulb is the correct replacement for the main light. It gives a soft yellow light, no modern wavelength adjustments.

These lamps are a perfect fit in our Panasonic Light/Heater/Exhaust Fan ceiling mounted unit.The 3500K model provides a nice natural slightly warm light without being too yellow. Please be aware that there are many specifications of these lights. Check your original lamp for model number, number of pins and overall wattage before purchasing.

Died in 3 days

Bought two to replace the Panasonic FDS18E35/4 bulbs that wouldn't start in our thirty-five year old bathroom ceiling fan. Perfect replacement: form, fit and function.

Fit, Brightness, Color are as per the specifications. So all good! Cannot comment on longevity yet. I am Okay with paying up to 20% higher for Sylvania brand, but these are almost double the price of no brand! I am still keeping these! :-)

My bathroom ceiling fan takes two of these compact fluorescent tubes, and both died at the same time. This vendor had exactly what I needed and at the best price I could find. The price included shipping, and the bulbs arrived in a perfectly reasonable time for a cross-country trip from NJ to CA. When I opened the box, I was particularly impressed with how well wrapped and fully protected the bulbs were. I would definitely order from the same vendor again.

I bought these for a Panasonic bathroom fan. They don't seem to last as long as the Panasonic original bulbs, but the genuine Panasonic ones are more expensive and a little harder to find.