Chromalux standard clear light bulb description: long life average 5000 hours natural balanced light chromalux light bulbs are long-life light bulbs that offer full spectrum lighting, which closely imitates natural daylight, reduces yellow glare, increases black and white contrast, improves readability, lessens eye strain, and helps promote a sense of well-being. Disclaimer these statements have not been evaluated by the fda. These products are not intended to diagnose, treat, cure, or prevent any disease. country of origin : united states size : 1 ct pack of : 1 selling unit : each