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

This is a lightbulb that fits in a somewhat oddly shaped socket. In my case, a bathroom light/vent combination. It is really quite wonderful. Thanks to a handy switch that is installed on my wall, I can turn it on freely on a whim. I find this most useful at night, as the room becomes very dark at those times (although recently the moon was full and the skies were clear, which made the light bulb superfluous). Perhaps my favorite feature is the ability to turn it off - this results in amazing energy savings when I am not in the room, or even during daylight hours when there is enough ambient light to see. Overall, I give this light bulb a five star rating as it has illuminated my bathroom to my satisfaction every time I have needed it (and even one time when I did not but flipped the switch out of habit)! I gave it merely average scores for "value" and "longevity" as I do not feel the few weeks I have had it installed long enough to really judge it for such qualities.

I purchased the 4100K 18W bulb. These replaced the stock lights in a Panasonic Whisperwarm bathroom fan. The stock lights lasted about 2 1/2 years and were not very bright, more of a yellow light. These are a bright white light, which I prefer. These are a noticeable improvement, but time will tell how long it will last. For the price, it's worth the purchase

My bathroom fan's light bulb had gone out. The cheapest original replacement bulb that I could find was over $20. So I ended up purchasing this item. With slight shaving of some of the plastic on the base of the bulb, the light perfectly fit in to the fan and it works perfectly... This was a great deal.

As described, works well. Bright, nice cool light color (a big improvement from the dingy warm yellow light that it replaced). Only been installed a few weeks so we'll see if it lasts.

I am not happy with the lifespan of these bulbs. I have purchased several through out the years and I date them when I install them. This light is used maybe twice or three times per 24 hours maybe for 15 minutes average, and as far as I remember they have not lasted more than two years. I believe the suggested average life span is much longer that what I am getting with them. I usually wait until both bulbs burn out, and they are about two months apart that they both are out of commission.

This is my second time buying these lights. Great product. Worked as expected. I mainly use from Panasonic Bath fan.

These are great. We needed to get white light in the home, and these bulbs do the trick. Cheaper and easier than changing the light fixtures. Also, the only place I could find them was here on Amazon. Home Depot and Lowes do not carry these bulbs in their stores, only the warm light versions.

Works great and awesome price.

Good Product