The Sunwave® full spectrum light bulb is one of the most accurate natural full spectrum light bulbs on the market today. With a color temperature of 5550 Kelvin degrees and Color Rendition Index (C.R.I.) of 93, this bulb can be compared to mid-day sun, the time of day when the sun has its highest photobiotic activity. By using these bulbs in your home or office, colors will be seen more clearly and vibrantly, which increases visual acuity. Sunwave® bulbs can help you feel less fatigue and have better concentration.