Philips 391177 Circline Fluorescent 32-Watt 12-Inch T9 Cool White Light Bulb Philips 32-watt, Circline Fluorescent light bulb is great for general purpose lighting anywhere in your home. Versatile for multiple applications, this 4100-Kelvin Fluorescent bulb is suitable for use in ceiling mounted fixtures in rooms such as kitchens and bathrooms. Features a Bipin base. Low-mercury design creates a smaller environmental footprint. Philips reuses as much glass and packaging material as possible, reducing environmental impact. Estimated annual energy cost of $3.85 (based on three hours/day). This long-lasting bulb shines for up to 12,000 hours. This product ships as a single bulb.