Incandescent lamps provide light, but they don't provide the same healthy, natural light of the sun. The licensed and patented Evolution 25-Watt CF Full-Spectrum Bulb simulates the full-spectrum natural outdoor sunlight to provide a healthier indoor environment while also saving energy. The full-spectrum bulb also lasts about 10 times longer than standard incandescent bulbs. The Evolution 25-Watt CF Full-Spectrum Bulb is a medium screw-base lamp designed to replace incandescent lights in table lamps, recessed down lights, porcelain keyless fixtures, and anywhere else you need energy saving possibilities of a fluorescent lamp. Natural light from the sun and sky has a balanced spectrum, rendering colors perfectly. Most artificial bulbs emit light rays in a narrow scope of the visual spectrum. This full-spectrum bulb helps people see better, feel better and creates a healthy indoor environment. The 25-Watt CF Full-Spectrum Bulb equals the light output of a standard 100-watt incandescent lamp. Full-spectrum bulbs are also available in 11-watt, 14-watt, and 20-watt sizes (the equivalent of 40-, 60-, and 75-watt incandescent lamps, respectively).