The average lifetime of these bulbs is 8000 hours, or 7 YEARS if run 3-4 hours/day.

These are the BEST bulbs to use as replacements in fixtures which have a dimmer circuit. They produce approximately the same quantity of light as a 100 Watt incandescent bulb at 1150 lumens. They are instant-start bulbs, with a minimum startup temperature of -4. They start up instantly. Excellent color rendering and light distribution. At maximum brightness, they only use 20% the electricity of a standard bulb! (Even less when dimmed!!) They are UL listed & EnergyStar qualified and conform to all UL standards. Smaller than other spiral fluorescent bulbs, these bulbs are the same size as ordinary incandescent bulb and they will fit into fixtures better; such as ceiling fans, porch lights, etc.

Dimmable CFL bulbs do not dim well below 20% dim level, above 20% the dimming is smooth like an incancescent. Also, they put out considerably more light than a 60 Watt standard bulb, which is often the max size allowed in tight fixtures. You get brighter light, dimmable control, longer life, and tremendous energy savings all at once! Suitable for indoor and dry outdoor locations, such as recessed fixtures, track lighting, lamps, etc or use with wall dimmers, table lamp dimmers, photocells, motion detectors, and timers. 120V, 60Hz standard screw in Edison type lamp socket. The dimmer circuit switch should be of recent manufacture. Older dimmer switches greater than 10 years old may have compatibility issues with any CFL. Bulb measures 4" wide and 5-3/8" tall (tip to tip).

Made in China