The FC16T9CW 40 Watt Sylvania Lamps are compact fluorescent bulbs designed for indoor use. These clear white light bulbs have a soft white finish and emit a natural/neutral color temperature. With a maximum overall length of 16 inches and a 4-pin base type, these T9 Circline bulbs provide 2600 lumens of light and have a bulb wattage of 40W. Featuring a non-dimmable design and a long average rated life of 10000 hours, these Sylvania lamps are a reliable choice for illuminating various spaces in your home or garden.