LED (Light Emitting Diodes) produce warm white or cool white light. Bulbs burn cool at 80% efficiency (80% of electrical energy is converted to light energy), while incandescent bulbs emit 80% of their energy as heat, only 20% as light. Will last 40,000 hours while incandescent last approximately 1,000 hours. Enhanced color rendering generates light that makes everything look more vivid and lifelike. Environmentally friendly with reduced CO2 emission. With 40 times longer life than incandescent bulbs, these Energy-saving 40,000-hour LED Light Bulbs produce high lumens of pure light, yet stay cool to the touch. By replacing the bulbs in your home with these LED bulbs, you'll take advantage of as much as 83% energy savings and still enjoy the equivalent light output. Using LED bulbs will make routine bulb replacement a thing of the past. . . . . . Free of lead and mercury making them safer for the environment . Compatible with most systems, so replacing your incandescent bulbs is easy . Dimmable bulbs are compatible with most TRIAC dimmers . Each bulb carries a 3-year warranty . View additional specifications.More Information