Ultra Definition LED (light emitting diode) A21 dimmable light bulb is specifically designed to provide high quality natural light that helps you see better. Enjoy comfortable, full-spectrum light that brings out the true colors and textures of your home. EyeComfort LED bulbs are designed to be comfortable on your eyes, with no visible flicker or glare. Can be used with most dimmers to create your desired ambience with smooth dimming to 10% of full light levels. Get the look and feel of traditional glass incandescent bulbs with the energy-efficient performance of LED. Long-lasting, beautiful light for up to 15,000 hours, or up to 15 years with average use. Enjoy the energy-savings and beautiful light of Philips LEDs and save up to 80% on your energy usage. Plastic-free packaging.