ENERGY EFFICIENT 3-WAY LED BULB - Uses 4/8/12W to yield equivalent illumination of 40/60/100W Incandescent and Halogen bulbs. BRIGHT 500/100/1500 lumens LONG LASTING - These Great Eagle LED bulbs last 20x longer than incandescent bulbs. Each light bulb is expected to deliver a lifetime of over 22 years (average usage rate of 3 hours per day) INSTANT ON – Full brightness immediately. No waiting like CFL bulbs to warm up SAFE – UL Listed for safety, Mercury and Lead-free, and no UV or IR radiation DO NOT USE DIMMER SWITCH with 3-Way bulbs. For use only with light fixtures intended to operate with 3-Way bulbs Immerse yourself in pure, clean, and soothing light. This Great Eagle LED light bulb offers 3 levels of illumination using a 3-way desk lamp, floor lamp, or table lamp. With each click of the switch, the LED bulb will cycle between off, 40w, 60w, and 100w equivalent brightness using only a fraction the power needed compared to an incandescent or halogen bulb. The Great Eagle LED family will immerse the room in beautiful light whether in a cozy family room, hotel lobby, or restaurant. This is a professional grade light bulb which is UL Listed, FCC and ROHS certified. Warm White 2700K is well suited for incandescent/halogen bulb replacement. Clear brilliant light with no additional yellow or blue tones added. A great all-around color that can be used anywhere. Our design contains no mercury, lead, or UV, and no dangerous glass to shatter.