This Full Spectrum lamp produces a “natural” light, like the illumination of northern or Artic sky daylight. Full Spectrum lighting is a must for applications where color judgments are made. Full Spectrum lamps come in four great colors: True Lite? , True Lite? Ultra, Artic Lite, and Trilumen 50. True Lite?: Renders light similar to noontime natural sunlight in the northern hemisphere.Color Rendering Index: 90 Kelvin Temperature: 5720