100 replacement. A smart way to save energy. Lasts 5 years (Guaranteed to last 5 years based on rated life at 4 hours consumer use per day at 120V). 2700K. Light Output: 1750 lumens (Lumens are stated in base-up position, base down position lumens may be more than 5% different). Energy Used: 26 watts. Life: 8000 hours. Contains: 1 bulb (Spiral). $59 in energy savings per bulb (Electricity cost savings based on using the bulb for 8,000 hr rated life at 10 cents per kilowatt hour compared to ten 100 watt soft white incandescent bulbs [rated life 750 hrs]). Reliable starting to 5 degrees F (-15 degrees C). Lamp requires a short warm up period to reach full brightness. Self-ballasted lamp. Energy star. UL listed. Made in China.