(4 Pack) Circle 23 Watt - 100 Watt CFL Cool White Light Bulb, CFL 4100K, Spiral Medium Base, CFL 100W Equivalent Light Bulbs, UL Listed SAVE MONEY - 23-Watt (100watt Equivalent) T2 Spiral Compact Fluorescent Light Bulbs for home medium screw (E26) Estimated Energy Cost $ $2.77 per year ROOM ENHANCER - Lift the mood of any room with its Natural 4100K White BRIGHTNESS - 100-Watt Replacement bulbs Designed to deliver performance with 1600 lumens providing fresh, energizing light, CRI 80 and Full Spectrum TOP QUALITY GUARANTEE - Made from high quality UL Listed materials and built to last for up to 10,000 hours, we strive to provide top quality products to our customers HAPPY CUSTOMERS - At Circle we put our customers FIRST! We truly believe that the happiness of our customers is the reason for a successful business. If for whatever reason you're dissatisfied with your order, simply contact us and we'll do whatever we can to make things right. All of our bulbs come with a 100% Satisfaction Guarantee!