What type of light do I need to help with S.A.D.?

I was wondering what type of light source could I use for S.A.D.. Compact fluorecent, LEDs , and which colour? Is there a specific wavelength?

Picture of What type of light do I need to help with S.A.D.?
Check this out.
ChrysN (author)  fungus amungus8 years ago
Thanks, that's perfect!