Discover the Secret of Nature's own sunlight using a sophisticated full-spectrum light bulb. VisionMax bulb produces comfortable and glare-free light which is excellent for reading, reduces eyestrain, and also saves energy. This full-spectrum bulb uses much less energy than a regular incandescent bulb, yet produces as much light as a 200-watt halogen bulb. This replacement bulb is perfect for reading, sewing, and close-up tasks, and reduces eyestrain for everyone but especially for those over 40. Color temperature is 6,400K, to deliver a bright white light that simulates natural sunlight. It's a great bulb for anyone who wants to bring natural light into their home and even helps with seasonal affective disorder by helping your body clock to get a better feel for the daylight cycle. Standard base Compact Fluorescent replacement bulb. DIMENSIONS - 2.1" Width x 6" Length. Standard E26 screw-in connection fits most lamps and light fixtures. Indoor use only. ENERGY EFFICIENT CFL - This bulb saves energy using only 18 watts, yet provides light equivalent to a 75 watt incandescent bulb. CFL bulb should last up to 10,000 hours. Which should outlast 10 regular bulbs. FULL SPECTRUM bulb uses much less energy than a regular incandescent bulb, yet produces as much light as a 75 watt incandescent bulb. It produces comfortable and glare-free light with better contrast, which is excellent for reading, reduces eyestrain, and also saves energy. True to life colors bring daylight indoors. NATURAL DAYLIGHT - This VisionMax replacement bulb is perfect for reading, sewing, and close-up tasks, and reduces eyestrain, especially for those over 40. With CRI = 90, you will see objects more clearly than with ordinary bulbs because colors appear more vivid and real; more true-to-life. INDOOR SUNLIGHT - Discover the Secret of Nature's own sunlight using a sophisticated full-spectrum light bulb. Color temperature is 6,400K, to deliver a bright white light that simulates natural sunlight. It's a great bulb for anyone who wants to bring natural light into their home & helps your body clock to get in tune with the daylight cycle.