Overdrive 144, (12-Pack), 100-Watts Equivalent Incandescent, 23W PAR38 Reflector Compact Fluorescent Light Bulb, 80 CRI, Cool White Overdrive 23W PAR38 Reflector Compact Fluorescent Light Bulb is equivalent to 100-Watts Incandescent light saves up to $84.7 over lifetime of the bulb (based on 3 hours/day usage, 11 cent/kWh) With 77% Energy Saving and long life of 10,000 hours, it lasts up to 9.1 years (based on 3 hours/day usage) High Luminous efficacy, Non-Dimmable Instant ON, Flicker-Free with brightness 1100 lumens, provides energetic, cool white light (4100K) Ideal for residential use in kitchens, living rooms, dining rooms, bedrooms etc. and commercial use in offices and retail spaces