Philips 433557 100-watt Equivalent, Bright White (6500K) 23 Watt Spiral CFL Light Bulb, 4-Pack Simulating sunrise inside your room, this 100-watt equivalent bulb turns on softly and warms to its full brightness in seconds, creating a relaxing and comfortable environment. Ideal for use with table lamps or in kitchens, living rooms, and hallways, this 6500-Kelvin bulb has a daylight color. Features a Medium Screw base. Choosing Philips Energy Saver light bulbs helps reduce greenhouse gas emissions and lasts up to 13 times longer than a standard incandescent bulb. Creating an inviting atmosphere around the home, Philips T2 bulb is ideal for use in kitchens, living rooms, dining rooms, offices, family rooms, and bedrooms. This lightbulb has a $1.57 estimated annual energy cost. This product ships a 4-pack and comes with a 2-year warranty.