💡 Sylvania 20668 Compact Fluorescent 4 Pin Double Tube 4100K, 18-watt: Energy-Efficient Lighting Solution for Any Space Review

It's great. We needed white light in the house and these bulbs did the job. Cheaper and easier than changing jigs. Also, the only place I could find them was here on Revane. Home Depot and Lowes do not sell these bulbs in their stores, only warm light versions.

I bought a 4100K 18W bulb. They replaced the standard bulbs in a Panasonic Whisperwarm bathroom fan. The stock headlights lasted about 2 1/2 years and weren't very bright, more of a yellow light. This is a bright white light that I prefer. It's a noticeable improvement, but time will tell how long it lasts. The purchase is justified for the price

I am not satisfied with the lifespan of these bulbs. I've bought several over the years and date them as I install them. These lamps are used maybe two or three times in 24 hours, maybe 15 minutes on average, and as far as I can remember they didn't last more than two years. I find the recommended average lifespan to be a lot longer than what I'm getting with them. . I usually wait for both bulbs to burn out and with a difference of about two months both have failed.