Full Spectrum Lighting:
Full spectrum light is a light source with a color temperature of 5000K plus, and a Color Rendering Index (CRI) of 90 plus.

Verilux states:

"Many companies have chosen to use term "full spectrum" because people instantly recognize that phrase. However, you can only achieve full spectrum in a fluorescent bulb.

Verilux coined the term natural spectrum and it is meant to describe the quality of the light without being inaccurante."

Comparing SoLux and Daylight to Verilux, & Bell+Howell

NaturalLighting.com
Full Spectrum (FS) and Seasonal Affective Disorder
1993 American Psychological Association Convention Papers at the Institute for Research in Construction.
The Full-Spectrum Controversy
Full Spectrum Lighting at Dr. Joseph Mercola's Total Health site.

Products:
FullSpectrumSolutions.com
Full Spectrum Lighting -Natural Full Spectrum Lighting Comparisons, Ratings, Reviews at AllergyBuyersClub.com
Energy Saving Compact Fluorescent Lamp Bulbs (CFL)