The Philips 12" Circline Cool White T9 bulb is designed for indoor use with a 4-pin base and a color temperature of 4100K. With a wattage of 32W, this energy-saving fluorescent bulb provides 1800 lumens and has a long lifespan of 12,000 hours. It is labeled as energy-saving and is suitable for use in lamps, lighting fixtures, and ceiling fans in homes and gardens. Made in China, this Philips model FC12T9 bulb offers efficient lighting for various indoor spaces.