You can now experience the superior quality of OttLite in your own light fixtures! This 20 watt compact fluorescent bulb replaces a standard 75 watt bulb, and helps you read and work with amazing clarity and comfort. This OttLite natural daylight bulb is designed to be low heat and also low glare to reduce eyestrain. Energy-efficient and rated to last up to 10,000 hours. Fits most standard light fixtures, but not with any dimming devices.