Researched the net, and found a number of links as follows:
- http://en.wikipedia.org/wiki/Full-spectrum_light
- http://www.wisegeek.com/what-are-full-spectrum-light-bulbs.htm
- http://www.ncpamd.com/seasonal.htm
- http://www.websciences.org/SLTBR/sadfaq.htm (lots of Q&A)
-...