This dimmable 53-watt bulb brings bright, warm, white light with a clear finish — adding a spectacular sparkle to your indoor or outdoor living spaces. Versatile for multiple applications, this bulb 2900-Kelvin is ideal for use in indoor recessed cans and track lights, as well as outdoor flood light fixtures. The dimming feature makes it easy to create the right ambiance for any activity. Features a Medium Screw base. Flipping the switch immediately lights your room to full brightness; no slow starting or waiting. Philips reuses as much glass and packaging material as possible, reducing environmental impact. This long-lasting bulb shines for up to 3.8 years, with estimated annual energy cost of $6.38 (based on three hours/day). This product ships as a single bulb.