Color rendering index of 92% (Natural Sunlight is 100%). Colors are enhanced and improves visual acuity. People work and feel better with Starlite Fluorescents. Promotes positive effects on health. Boosts physical fitness. Rated at 36,000 user hours. Lasts five times the life of a Conventional fluorescent lamp. Kelvin Temperature 5765 degrees. Used in schools, offices, factories, showrooms, dental offices and labs, etc.