Get the right energy saving LED light in any room, any time. All from 1-light bulb, you can pre-select a color temperature setting or adjust with a standard light switch. There are no additional hardware or special apps required and IntelliBulb LED bulbs are a great low-cost, energy-saving replacement to existing incandescent bulbs. Get up to 15,000-hours of beautiful 5000K daylight, 4000K cool white or 2700K soft. white light.