Best gift for anyone. Benefits of full spectrum lighting: Increases contrast in Reading, increase release of seratonin, increases vitamin D production in skin, which helps the body efficiently use calcium and helps with the winter blues, reduce levels of melatonin, a hormone that promotes fatigue. About the Bulb: Color Temperature is 6500 Kelvin, High lumen output full spectrum bulb lasts 10,000 hours, low energy usage .