Globe Electric's 30/60/100W Equivalent Warm White A-Type Three Way LED Light Bulb is the ideal bulb for all your lighting needs. With a warm white color of 3000 kelvin, you have a traditional warm and cozy ambiance anywhere you need. This 3-way LED bulb is for use in lamps with a three-way rotary socket only. Switch from 30-watts at 350 lumens, 60-watts at 800 lumens, and 100-watts at 1500 lumens by turning the 3-way socket's rotary switch to provide the ideal light for every situation. Replacing traditional incandescent light bulbs, you use approximately 84% less energy and save an average of $58.30 in yearly energy costs (based on an 11c per kWh, 3 h per day usage). With an extended lifetime of 10,000 hours, it reduces the hassle of frequent bulb replacements and saves you money in the long run. This LED bulb is not dimmable and cannot be used with a dimmer switch. LED's turn on instantly, are very durable, are not prone to failure and emit very little heat.